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# frp
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[](https://circleci.com/gh/fatedier/frp)
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[](https://github.com/fatedier/frp/releases)
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[README](README.md) | [中文文档](README_zh.md)
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## What is frp?
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frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet. As of now, it supports **TCP** and **UDP**, as well as **HTTP** and **HTTPS** protocols, where requests can be forwarded to internal services by domain name.
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frp also has a P2P connect mode.
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## Table of Contents
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<!-- vim-markdown-toc GFM -->
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* [Development Status](#development-status)
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* [Architecture](#architecture)
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* [Example Usage](#example-usage)
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* [Access your computer in LAN by SSH](#access-your-computer-in-lan-by-ssh)
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* [Visit your web service in LAN by custom domains](#visit-your-web-service-in-lan-by-custom-domains)
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* [Forward DNS query request](#forward-dns-query-request)
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* [Forward Unix domain socket](#forward-unix-domain-socket)
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* [Expose a simple HTTP file server](#expose-a-simple-http-file-server)
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* [Enable HTTPS for local HTTP(S) service](#enable-https-for-local-https-service)
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* [Expose your service privately](#expose-your-service-privately)
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* [P2P Mode](#p2p-mode)
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* [Features](#features)
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* [Configuration Files](#configuration-files)
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* [Using Environment Variables](#using-environment-variables)
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* [Split Configures Into Different Files](#split-configures-into-different-files)
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* [Dashboard](#dashboard)
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* [Admin UI](#admin-ui)
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* [Monitor](#monitor)
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* [Prometheus](#prometheus)
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* [Authenticating the Client](#authenticating-the-client)
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* [Token Authentication](#token-authentication)
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* [OIDC Authentication](#oidc-authentication)
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* [Encryption and Compression](#encryption-and-compression)
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* [TLS](#tls)
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* [Hot-Reloading frpc configuration](#hot-reloading-frpc-configuration)
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* [Get proxy status from client](#get-proxy-status-from-client)
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* [Only allowing certain ports on the server](#only-allowing-certain-ports-on-the-server)
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* [Port Reuse](#port-reuse)
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* [Bandwidth Limit](#bandwidth-limit)
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* [For Each Proxy](#for-each-proxy)
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* [TCP Stream Multiplexing](#tcp-stream-multiplexing)
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* [Support KCP Protocol](#support-kcp-protocol)
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* [Connection Pooling](#connection-pooling)
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* [Load balancing](#load-balancing)
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* [Service Health Check](#service-health-check)
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* [Rewriting the HTTP Host Header](#rewriting-the-http-host-header)
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* [Setting other HTTP Headers](#setting-other-http-headers)
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* [Get Real IP](#get-real-ip)
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* [HTTP X-Forwarded-For](#http-x-forwarded-for)
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* [Proxy Protocol](#proxy-protocol)
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* [Require HTTP Basic Auth (Password) for Web Services](#require-http-basic-auth-password-for-web-services)
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* [Custom Subdomain Names](#custom-subdomain-names)
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* [URL Routing](#url-routing)
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* [TCP Port Multiplexing](#tcp-port-multiplexing)
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* [Connecting to frps via HTTP PROXY](#connecting-to-frps-via-http-proxy)
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* [Range ports mapping](#range-ports-mapping)
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* [Client Plugins](#client-plugins)
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* [Server Manage Plugins](#server-manage-plugins)
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* [Development Plan](#development-plan)
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* [Contributing](#contributing)
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* [Donation](#donation)
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* [AliPay](#alipay)
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* [Wechat Pay](#wechat-pay)
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* [PayPal](#paypal)
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<!-- vim-markdown-toc -->
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## Development Status
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frp is under development. Try the latest release version in the `master` branch, or use the `dev` branch for the version in development.
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We are working on v2 version and trying to do some code refactor and improvements. It won't be compatible with v1.
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We will switch v0 to v1 at the right time and only accept bug fixes and improvements instead of big feature requirements.
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## Architecture
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## Example Usage
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Firstly, download the latest programs from [Release](https://github.com/fatedier/frp/releases) page according to your operating system and architecture.
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Put `frps` and `frps.ini` onto your server A with public IP.
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Put `frpc` and `frpc.ini` onto your server B in LAN (that can't be connected from public Internet).
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### Access your computer in LAN by SSH
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1. Modify `frps.ini` on server A and set the `bind_port` to be connected to frp clients:
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```ini
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# frps.ini
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[common]
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bind_port = 7000
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```
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2. Start `frps` on server A:
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`./frps -c ./frps.ini`
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3. On server B, modify `frpc.ini` to put in your `frps` server public IP as `server_addr` field:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[ssh]
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type = tcp
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local_ip = 127.0.0.1
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local_port = 22
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remote_port = 6000
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```
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Note that `local_port` (listened on client) and `remote_port` (exposed on server) are for traffic goes in/out the frp system, whereas `server_port` is used between frps.
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4. Start `frpc` on server B:
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`./frpc -c ./frpc.ini`
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5. From another machine, SSH to server B like this (assuming that username is `test`):
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`ssh -oPort=6000 test@x.x.x.x`
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### Visit your web service in LAN by custom domains
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Sometimes we want to expose a local web service behind a NAT network to others for testing with your own domain name and unfortunately we can't resolve a domain name to a local IP.
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However, we can expose an HTTP(S) service using frp.
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1. Modify `frps.ini`, set the vhost HTTP port to 8080:
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```ini
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# frps.ini
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[common]
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bind_port = 7000
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vhost_http_port = 8080
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```
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2. Start `frps`:
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`./frps -c ./frps.ini`
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3. Modify `frpc.ini` and set `server_addr` to the IP address of the remote frps server. The `local_port` is the port of your web service:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[web]
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type = http
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local_port = 80
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custom_domains = www.example.com
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```
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4. Start `frpc`:
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`./frpc -c ./frpc.ini`
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5. Resolve A record of `www.example.com` to the public IP of the remote frps server or CNAME record to your origin domain.
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6. Now visit your local web service using url `http://www.example.com:8080`.
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### Forward DNS query request
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1. Modify `frps.ini`:
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```ini
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# frps.ini
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[common]
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bind_port = 7000
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```
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2. Start `frps`:
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`./frps -c ./frps.ini`
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3. Modify `frpc.ini` and set `server_addr` to the IP address of the remote frps server, forward DNS query request to Google Public DNS server `8.8.8.8:53`:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[dns]
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type = udp
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local_ip = 8.8.8.8
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local_port = 53
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remote_port = 6000
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```
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4. Start frpc:
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`./frpc -c ./frpc.ini`
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5. Test DNS resolution using `dig` command:
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`dig @x.x.x.x -p 6000 www.google.com`
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### Forward Unix domain socket
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Expose a Unix domain socket (e.g. the Docker daemon socket) as TCP.
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Configure `frps` same as above.
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1. Start `frpc` with configuration:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[unix_domain_socket]
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type = tcp
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remote_port = 6000
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plugin = unix_domain_socket
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plugin_unix_path = /var/run/docker.sock
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```
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2. Test: Get Docker version using `curl`:
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`curl http://x.x.x.x:6000/version`
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### Expose a simple HTTP file server
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Browser your files stored in the LAN, from public Internet.
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Configure `frps` same as above.
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1. Start `frpc` with configuration:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[test_static_file]
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type = tcp
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remote_port = 6000
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plugin = static_file
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plugin_local_path = /tmp/files
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plugin_strip_prefix = static
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plugin_http_user = abc
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plugin_http_passwd = abc
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```
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2. Visit `http://x.x.x.x:6000/static/` from your browser and specify correct user and password to view files in `/tmp/files` on the `frpc` machine.
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### Enable HTTPS for local HTTP(S) service
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You may substitute `https2https` for the plugin, and point the `plugin_local_addr` to a HTTPS endpoint.
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1. Start `frpc` with configuration:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[test_https2http]
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type = https
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custom_domains = test.example.com
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plugin = https2http
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plugin_local_addr = 127.0.0.1:80
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plugin_crt_path = ./server.crt
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plugin_key_path = ./server.key
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plugin_host_header_rewrite = 127.0.0.1
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plugin_header_X-From-Where = frp
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```
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2. Visit `https://test.example.com`.
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### Expose your service privately
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Some services will be at risk if exposed directly to the public network. With **STCP** (secret TCP) mode, a preshared key is needed to access the service from another client.
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Configure `frps` same as above.
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1. Start `frpc` on machine B with the following config. This example is for exposing the SSH service (port 22), and note the `sk` field for the preshared key, and that the `remote_port` field is removed here:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[secret_ssh]
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type = stcp
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sk = abcdefg
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local_ip = 127.0.0.1
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local_port = 22
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```
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2. Start another `frpc` (typically on another machine C) with the following config to access the SSH service with a security key (`sk` field):
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[secret_ssh_visitor]
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type = stcp
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role = visitor
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server_name = secret_ssh
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sk = abcdefg
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bind_addr = 127.0.0.1
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bind_port = 6000
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```
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3. On machine C, connect to SSH on machine B, using this command:
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`ssh -oPort=6000 127.0.0.1`
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### P2P Mode
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**xtcp** is designed for transmitting large amounts of data directly between clients. A frps server is still needed, as P2P here only refers the actual data transmission.
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Note it can't penetrate all types of NAT devices. You might want to fallback to **stcp** if **xtcp** doesn't work.
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1. In `frps.ini` configure a UDP port for xtcp:
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```ini
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# frps.ini
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bind_udp_port = 7001
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```
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2. Start `frpc` on machine B, expose the SSH port. Note that `remote_port` field is removed:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[p2p_ssh]
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type = xtcp
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sk = abcdefg
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local_ip = 127.0.0.1
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local_port = 22
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```
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3. Start another `frpc` (typically on another machine C) with the config to connect to SSH using P2P mode:
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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[p2p_ssh_visitor]
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type = xtcp
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role = visitor
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server_name = p2p_ssh
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sk = abcdefg
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bind_addr = 127.0.0.1
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bind_port = 6000
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```
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4. On machine C, connect to SSH on machine B, using this command:
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`ssh -oPort=6000 127.0.0.1`
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## Features
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### Configuration Files
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Read the full example configuration files to find out even more features not described here.
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[Full configuration file for frps (Server)](./conf/frps_full.ini)
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[Full configuration file for frpc (Client)](./conf/frpc_full.ini)
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### Using Environment Variables
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Environment variables can be referenced in the configuration file, using Go's standard format:
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```ini
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# frpc.ini
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[common]
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server_addr = {{ .Envs.FRP_SERVER_ADDR }}
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server_port = 7000
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[ssh]
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type = tcp
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local_ip = 127.0.0.1
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local_port = 22
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remote_port = {{ .Envs.FRP_SSH_REMOTE_PORT }}
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```
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With the config above, variables can be passed into `frpc` program like this:
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```
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export FRP_SERVER_ADDR="x.x.x.x"
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export FRP_SSH_REMOTE_PORT="6000"
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./frpc -c ./frpc.ini
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```
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`frpc` will render configuration file template using OS environment variables. Remember to prefix your reference with `.Envs`.
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### Split Configures Into Different Files
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You can split multiple proxy configs into different files and include them in the main file.
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```ini
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# frpc.ini
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[common]
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server_addr = x.x.x.x
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server_port = 7000
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includes=./confd/*.ini
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```
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```ini
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# ./confd/test.ini
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[ssh]
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type = tcp
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local_ip = 127.0.0.1
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local_port = 22
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remote_port = 6000
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```
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### Dashboard
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Check frp's status and proxies' statistics information by Dashboard.
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Configure a port for dashboard to enable this feature:
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```ini
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[common]
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dashboard_port = 7500
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# dashboard's username and password are both optional
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dashboard_user = admin
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dashboard_pwd = admin
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```
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Then visit `http://[server_addr]:7500` to see the dashboard, with username and password both being `admin`.
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|
|
### Admin UI
|
|
|
|
|
|
The Admin UI helps you check and manage frpc's configuration.
|
|
|
|
|
|
Configure an address for admin UI to enable this feature:
|
|
|
|
|
|
```ini
|
|
|
[common]
|
|
|
admin_addr = 127.0.0.1
|
|
|
admin_port = 7400
|
|
|
admin_user = admin
|
|
|
admin_pwd = admin
|
|
|
```
|
|
|
|
|
|
Then visit `http://127.0.0.1:7400` to see admin UI, with username and password both being `admin`.
|
|
|
|
|
|
### Monitor
|
|
|
|
|
|
When dashboard is enabled, frps will save monitor data in cache. It will be cleared after process restart.
|
|
|
|
|
|
Prometheus is also supported.
|
|
|
|
|
|
#### Prometheus
|
|
|
|
|
|
Enable dashboard first, then configure `enable_prometheus = true` in `frps.ini`.
|
|
|
|
|
|
`http://{dashboard_addr}/metrics` will provide prometheus monitor data.
|
|
|
|
|
|
### Authenticating the Client
|
|
|
|
|
|
There are 2 authentication methods to authenticate frpc with frps.
|
|
|
|
|
|
You can decide which one to use by configuring `authentication_method` under `[common]` in `frpc.ini` and `frps.ini`.
|
|
|
|
|
|
Configuring `authenticate_heartbeats = true` under `[common]` will use the configured authentication method to add and validate authentication on every heartbeat between frpc and frps.
|
|
|
|
|
|
Configuring `authenticate_new_work_conns = true` under `[common]` will do the same for every new work connection between frpc and frps.
|
|
|
|
|
|
#### Token Authentication
|
|
|
|
|
|
When specifying `authentication_method = token` under `[common]` in `frpc.ini` and `frps.ini` - token based authentication will be used.
|
|
|
|
|
|
Make sure to specify the same `token` in the `[common]` section in `frps.ini` and `frpc.ini` for frpc to pass frps validation
|
|
|
|
|
|
#### OIDC Authentication
|
|
|
|
|
|
When specifying `authentication_method = oidc` under `[common]` in `frpc.ini` and `frps.ini` - OIDC based authentication will be used.
|
|
|
|
|
|
OIDC stands for OpenID Connect, and the flow used is called [Client Credentials Grant](https://tools.ietf.org/html/rfc6749#section-4.4).
|
|
|
|
|
|
To use this authentication type - configure `frpc.ini` and `frps.ini` as follows:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
[common]
|
|
|
authentication_method = oidc
|
|
|
oidc_issuer = https://example-oidc-issuer.com/
|
|
|
oidc_audience = https://oidc-audience.com/.default
|
|
|
```
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
authentication_method = oidc
|
|
|
oidc_client_id = 98692467-37de-409a-9fac-bb2585826f18 # Replace with OIDC client ID
|
|
|
oidc_client_secret = oidc_secret
|
|
|
oidc_audience = https://oidc-audience.com/.default
|
|
|
oidc_token_endpoint_url = https://example-oidc-endpoint.com/oauth2/v2.0/token
|
|
|
```
|
|
|
|
|
|
### Encryption and Compression
|
|
|
|
|
|
The features are off by default. You can turn on encryption and/or compression:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[ssh]
|
|
|
type = tcp
|
|
|
local_port = 22
|
|
|
remote_port = 6000
|
|
|
use_encryption = true
|
|
|
use_compression = true
|
|
|
```
|
|
|
|
|
|
#### TLS
|
|
|
|
|
|
frp supports the TLS protocol between `frpc` and `frps` since v0.25.0.
|
|
|
|
|
|
For port multiplexing, frp sends a first byte `0x17` to dial a TLS connection.
|
|
|
|
|
|
Configure `tls_enable = true` in the `[common]` section to `frpc.ini` to enable this feature.
|
|
|
|
|
|
To **enforce** `frps` to only accept TLS connections - configure `tls_only = true` in the `[common]` section in `frps.ini`. **This is optional.**
|
|
|
|
|
|
**`frpc` TLS settings (under the `[common]` section):**
|
|
|
```ini
|
|
|
tls_enable = true
|
|
|
tls_cert_file = certificate.crt
|
|
|
tls_key_file = certificate.key
|
|
|
tls_trusted_ca_file = ca.crt
|
|
|
```
|
|
|
|
|
|
**`frps` TLS settings (under the `[common]` section):**
|
|
|
```ini
|
|
|
tls_only = true
|
|
|
tls_enable = true
|
|
|
tls_cert_file = certificate.crt
|
|
|
tls_key_file = certificate.key
|
|
|
tls_trusted_ca_file = ca.crt
|
|
|
```
|
|
|
|
|
|
You will need **a root CA cert** and **at least one SSL/TLS certificate**. It **can** be self-signed or regular (such as Let's Encrypt or another SSL/TLS certificate provider).
|
|
|
|
|
|
If you using `frp` via IP address and not hostname, make sure to set the appropriate IP address in the Subject Alternative Name (SAN) area when generating SSL/TLS Certificates.
|
|
|
|
|
|
Given an example:
|
|
|
|
|
|
* Prepare openssl config file. It exists at `/etc/pki/tls/openssl.cnf` in Linux System and `/System/Library/OpenSSL/openssl.cnf` in MacOS, and you can copy it to current path, like `cp /etc/pki/tls/openssl.cnf ./my-openssl.cnf`. If not, you can build it by yourself, like:
|
|
|
```
|
|
|
cat > my-openssl.cnf << EOF
|
|
|
[ ca ]
|
|
|
default_ca = CA_default
|
|
|
[ CA_default ]
|
|
|
x509_extensions = usr_cert
|
|
|
[ req ]
|
|
|
default_bits = 2048
|
|
|
default_md = sha256
|
|
|
default_keyfile = privkey.pem
|
|
|
distinguished_name = req_distinguished_name
|
|
|
attributes = req_attributes
|
|
|
x509_extensions = v3_ca
|
|
|
string_mask = utf8only
|
|
|
[ req_distinguished_name ]
|
|
|
[ req_attributes ]
|
|
|
[ usr_cert ]
|
|
|
basicConstraints = CA:FALSE
|
|
|
nsComment = "OpenSSL Generated Certificate"
|
|
|
subjectKeyIdentifier = hash
|
|
|
authorityKeyIdentifier = keyid,issuer
|
|
|
[ v3_ca ]
|
|
|
subjectKeyIdentifier = hash
|
|
|
authorityKeyIdentifier = keyid:always,issuer
|
|
|
basicConstraints = CA:true
|
|
|
EOF
|
|
|
```
|
|
|
|
|
|
* build ca certificates:
|
|
|
```
|
|
|
openssl genrsa -out ca.key 2048
|
|
|
openssl req -x509 -new -nodes -key ca.key -subj "/CN=example.ca.com" -days 5000 -out ca.crt
|
|
|
```
|
|
|
|
|
|
* build frps certificates:
|
|
|
```
|
|
|
openssl genrsa -out server.key 2048
|
|
|
|
|
|
openssl req -new -sha256 -key server.key \
|
|
|
-subj "/C=XX/ST=DEFAULT/L=DEFAULT/O=DEFAULT/CN=server.com" \
|
|
|
-reqexts SAN \
|
|
|
-config <(cat my-openssl.cnf <(printf "\n[SAN]\nsubjectAltName=DNS:localhost,IP:127.0.0.1,DNS:example.server.com")) \
|
|
|
-out server.csr
|
|
|
|
|
|
openssl x509 -req -days 365 \
|
|
|
-in server.csr -CA ca.crt -CAkey ca.key -CAcreateserial \
|
|
|
-extfile <(printf "subjectAltName=DNS:localhost,IP:127.0.0.1,DNS:example.server.com") \
|
|
|
-out server.crt
|
|
|
```
|
|
|
|
|
|
* build frpc certificates：
|
|
|
```
|
|
|
openssl genrsa -out client.key 2048
|
|
|
openssl req -new -sha256 -key client.key \
|
|
|
-subj "/C=XX/ST=DEFAULT/L=DEFAULT/O=DEFAULT/CN=client.com" \
|
|
|
-reqexts SAN \
|
|
|
-config <(cat my-openssl.cnf <(printf "\n[SAN]\nsubjectAltName=DNS:client.com,DNS:example.client.com")) \
|
|
|
-out client.csr
|
|
|
|
|
|
openssl x509 -req -days 365 \
|
|
|
-in client.csr -CA ca.crt -CAkey ca.key -CAcreateserial \
|
|
|
-extfile <(printf "subjectAltName=DNS:client.com,DNS:example.client.com") \
|
|
|
-out client.crt
|
|
|
```
|
|
|
|
|
|
### Hot-Reloading frpc configuration
|
|
|
|
|
|
The `admin_addr` and `admin_port` fields are required for enabling HTTP API:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
admin_addr = 127.0.0.1
|
|
|
admin_port = 7400
|
|
|
```
|
|
|
|
|
|
Then run command `frpc reload -c ./frpc.ini` and wait for about 10 seconds to let `frpc` create or update or remove proxies.
|
|
|
|
|
|
**Note that parameters in [common] section won't be modified except 'start'.**
|
|
|
|
|
|
You can run command `frpc verify -c ./frpc.ini` before reloading to check if there are config errors.
|
|
|
|
|
|
### Get proxy status from client
|
|
|
|
|
|
Use `frpc status -c ./frpc.ini` to get status of all proxies. The `admin_addr` and `admin_port` fields are required for enabling HTTP API.
|
|
|
|
|
|
### Only allowing certain ports on the server
|
|
|
|
|
|
`allow_ports` in `frps.ini` is used to avoid abuse of ports:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
[common]
|
|
|
allow_ports = 2000-3000,3001,3003,4000-50000
|
|
|
```
|
|
|
|
|
|
`allow_ports` consists of specific ports or port ranges (lowest port number, dash `-`, highest port number), separated by comma `,`.
|
|
|
|
|
|
### Port Reuse
|
|
|
|
|
|
`vhost_http_port` and `vhost_https_port` in frps can use same port with `bind_port`. frps will detect the connection's protocol and handle it correspondingly.
|
|
|
|
|
|
We would like to try to allow multiple proxies bind a same remote port with different protocols in the future.
|
|
|
|
|
|
### Bandwidth Limit
|
|
|
|
|
|
#### For Each Proxy
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[ssh]
|
|
|
type = tcp
|
|
|
local_port = 22
|
|
|
remote_port = 6000
|
|
|
bandwidth_limit = 1MB
|
|
|
```
|
|
|
|
|
|
Set `bandwidth_limit` in each proxy's configure to enable this feature. Supported units are `MB` and `KB`.
|
|
|
|
|
|
### TCP Stream Multiplexing
|
|
|
|
|
|
frp supports tcp stream multiplexing since v0.10.0 like HTTP2 Multiplexing, in which case all logic connections to the same frpc are multiplexed into the same TCP connection.
|
|
|
|
|
|
You can disable this feature by modify `frps.ini` and `frpc.ini`:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini and frpc.ini, must be same
|
|
|
[common]
|
|
|
tcp_mux = false
|
|
|
```
|
|
|
|
|
|
### Support KCP Protocol
|
|
|
|
|
|
KCP is a fast and reliable protocol that can achieve the transmission effect of a reduction of the average latency by 30% to 40% and reduction of the maximum delay by a factor of three, at the cost of 10% to 20% more bandwidth wasted than TCP.
|
|
|
|
|
|
KCP mode uses UDP as the underlying transport. Using KCP in frp:
|
|
|
|
|
|
1. Enable KCP in frps:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
[common]
|
|
|
bind_port = 7000
|
|
|
# Specify a UDP port for KCP.
|
|
|
kcp_bind_port = 7000
|
|
|
```
|
|
|
|
|
|
The `kcp_bind_port` number can be the same number as `bind_port`, since `bind_port` field specifies a TCP port.
|
|
|
|
|
|
2. Configure `frpc.ini` to use KCP to connect to frps:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
server_addr = x.x.x.x
|
|
|
# Same as the 'kcp_bind_port' in frps.ini
|
|
|
server_port = 7000
|
|
|
protocol = kcp
|
|
|
```
|
|
|
|
|
|
### Connection Pooling
|
|
|
|
|
|
By default, frps creates a new frpc connection to the backend service upon a user request. With connection pooling, frps keeps a certain number of pre-established connections, reducing the time needed to establish a connection.
|
|
|
|
|
|
This feature is suitable for a large number of short connections.
|
|
|
|
|
|
1. Configure the limit of pool count each proxy can use in `frps.ini`:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
[common]
|
|
|
max_pool_count = 5
|
|
|
```
|
|
|
|
|
|
2. Enable and specify the number of connection pool:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
pool_count = 1
|
|
|
```
|
|
|
|
|
|
### Load balancing
|
|
|
|
|
|
Load balancing is supported by `group`.
|
|
|
|
|
|
This feature is only available for types `tcp`, `http`, `tcpmux` now.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[test1]
|
|
|
type = tcp
|
|
|
local_port = 8080
|
|
|
remote_port = 80
|
|
|
group = web
|
|
|
group_key = 123
|
|
|
|
|
|
[test2]
|
|
|
type = tcp
|
|
|
local_port = 8081
|
|
|
remote_port = 80
|
|
|
group = web
|
|
|
group_key = 123
|
|
|
```
|
|
|
|
|
|
`group_key` is used for authentication.
|
|
|
|
|
|
Connections to port 80 will be dispatched to proxies in the same group randomly.
|
|
|
|
|
|
For type `tcp`, `remote_port` in the same group should be the same.
|
|
|
|
|
|
For type `http`, `custom_domains`, `subdomain`, `locations` should be the same.
|
|
|
|
|
|
### Service Health Check
|
|
|
|
|
|
Health check feature can help you achieve high availability with load balancing.
|
|
|
|
|
|
Add `health_check_type = tcp` or `health_check_type = http` to enable health check.
|
|
|
|
|
|
With health check type **tcp**, the service port will be pinged (TCPing):
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[test1]
|
|
|
type = tcp
|
|
|
local_port = 22
|
|
|
remote_port = 6000
|
|
|
# Enable TCP health check
|
|
|
health_check_type = tcp
|
|
|
# TCPing timeout seconds
|
|
|
health_check_timeout_s = 3
|
|
|
# If health check failed 3 times in a row, the proxy will be removed from frps
|
|
|
health_check_max_failed = 3
|
|
|
# A health check every 10 seconds
|
|
|
health_check_interval_s = 10
|
|
|
```
|
|
|
|
|
|
With health check type **http**, an HTTP request will be sent to the service and an HTTP 2xx OK response is expected:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web]
|
|
|
type = http
|
|
|
local_ip = 127.0.0.1
|
|
|
local_port = 80
|
|
|
custom_domains = test.example.com
|
|
|
# Enable HTTP health check
|
|
|
health_check_type = http
|
|
|
# frpc will send a GET request to '/status'
|
|
|
# and expect an HTTP 2xx OK response
|
|
|
health_check_url = /status
|
|
|
health_check_timeout_s = 3
|
|
|
health_check_max_failed = 3
|
|
|
health_check_interval_s = 10
|
|
|
```
|
|
|
|
|
|
### Rewriting the HTTP Host Header
|
|
|
|
|
|
By default frp does not modify the tunneled HTTP requests at all as it's a byte-for-byte copy.
|
|
|
|
|
|
However, speaking of web servers and HTTP requests, your web server might rely on the `Host` HTTP header to determine the website to be accessed. frp can rewrite the `Host` header when forwarding the HTTP requests, with the `host_header_rewrite` field:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web]
|
|
|
type = http
|
|
|
local_port = 80
|
|
|
custom_domains = test.example.com
|
|
|
host_header_rewrite = dev.example.com
|
|
|
```
|
|
|
|
|
|
The HTTP request will have the the `Host` header rewritten to `Host: dev.example.com` when it reaches the actual web server, although the request from the browser probably has `Host: test.example.com`.
|
|
|
|
|
|
### Setting other HTTP Headers
|
|
|
|
|
|
Similar to `Host`, You can override other HTTP request headers with proxy type `http`.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web]
|
|
|
type = http
|
|
|
local_port = 80
|
|
|
custom_domains = test.example.com
|
|
|
host_header_rewrite = dev.example.com
|
|
|
header_X-From-Where = frp
|
|
|
```
|
|
|
|
|
|
Note that parameter(s) prefixed with `header_` will be added to HTTP request headers.
|
|
|
|
|
|
In this example, it will set header `X-From-Where: frp` in the HTTP request.
|
|
|
|
|
|
### Get Real IP
|
|
|
|
|
|
#### HTTP X-Forwarded-For
|
|
|
|
|
|
This feature is for http proxy only.
|
|
|
|
|
|
You can get user's real IP from HTTP request headers `X-Forwarded-For` and `X-Real-IP`.
|
|
|
|
|
|
#### Proxy Protocol
|
|
|
|
|
|
frp supports Proxy Protocol to send user's real IP to local services. It support all types except UDP.
|
|
|
|
|
|
Here is an example for https service:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web]
|
|
|
type = https
|
|
|
local_port = 443
|
|
|
custom_domains = test.example.com
|
|
|
|
|
|
# now v1 and v2 are supported
|
|
|
proxy_protocol_version = v2
|
|
|
```
|
|
|
|
|
|
You can enable Proxy Protocol support in nginx to expose user's real IP in HTTP header `X-Real-IP`, and then read `X-Real-IP` header in your web service for the real IP.
|
|
|
|
|
|
### Require HTTP Basic Auth (Password) for Web Services
|
|
|
|
|
|
Anyone who can guess your tunnel URL can access your local web server unless you protect it with a password.
|
|
|
|
|
|
This enforces HTTP Basic Auth on all requests with the username and password specified in frpc's configure file.
|
|
|
|
|
|
It can only be enabled when proxy type is http.
|
|
|
|
|
|
```ini
|
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|
# frpc.ini
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|
[web]
|
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|
type = http
|
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|
local_port = 80
|
|
|
custom_domains = test.example.com
|
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|
http_user = abc
|
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|
http_pwd = abc
|
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|
```
|
|
|
|
|
|
Visit `http://test.example.com` in the browser and now you are prompted to enter the username and password.
|
|
|
|
|
|
### Custom Subdomain Names
|
|
|
|
|
|
It is convenient to use `subdomain` configure for http and https types when many people share one frps server.
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
subdomain_host = frps.com
|
|
|
```
|
|
|
|
|
|
Resolve `*.frps.com` to the frps server's IP. This is usually called a Wildcard DNS record.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web]
|
|
|
type = http
|
|
|
local_port = 80
|
|
|
subdomain = test
|
|
|
```
|
|
|
|
|
|
Now you can visit your web service on `test.frps.com`.
|
|
|
|
|
|
Note that if `subdomain_host` is not empty, `custom_domains` should not be the subdomain of `subdomain_host`.
|
|
|
|
|
|
### URL Routing
|
|
|
|
|
|
frp supports forwarding HTTP requests to different backend web services by url routing.
|
|
|
|
|
|
`locations` specifies the prefix of URL used for routing. frps first searches for the most specific prefix location given by literal strings regardless of the listed order.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[web01]
|
|
|
type = http
|
|
|
local_port = 80
|
|
|
custom_domains = web.example.com
|
|
|
locations = /
|
|
|
|
|
|
[web02]
|
|
|
type = http
|
|
|
local_port = 81
|
|
|
custom_domains = web.example.com
|
|
|
locations = /news,/about
|
|
|
```
|
|
|
|
|
|
HTTP requests with URL prefix `/news` or `/about` will be forwarded to **web02** and other requests to **web01**.
|
|
|
|
|
|
### TCP Port Multiplexing
|
|
|
|
|
|
frp supports receiving TCP sockets directed to different proxies on a single port on frps, similar to `vhost_http_port` and `vhost_https_port`.
|
|
|
|
|
|
The only supported TCP port multiplexing method available at the moment is `httpconnect` - HTTP CONNECT tunnel.
|
|
|
|
|
|
When setting `tcpmux_httpconnect_port` to anything other than 0 in frps under `[common]`, frps will listen on this port for HTTP CONNECT requests.
|
|
|
|
|
|
The host of the HTTP CONNECT request will be used to match the proxy in frps. Proxy hosts can be configured in frpc by configuring `custom_domain` and / or `subdomain` under `type = tcpmux` proxies, when `multiplexer = httpconnect`.
|
|
|
|
|
|
For example:
|
|
|
|
|
|
```ini
|
|
|
# frps.ini
|
|
|
[common]
|
|
|
bind_port = 7000
|
|
|
tcpmux_httpconnect_port = 1337
|
|
|
```
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
server_addr = x.x.x.x
|
|
|
server_port = 7000
|
|
|
|
|
|
[proxy1]
|
|
|
type = tcpmux
|
|
|
multiplexer = httpconnect
|
|
|
custom_domains = test1
|
|
|
local_port = 80
|
|
|
|
|
|
[proxy2]
|
|
|
type = tcpmux
|
|
|
multiplexer = httpconnect
|
|
|
custom_domains = test2
|
|
|
local_port = 8080
|
|
|
```
|
|
|
|
|
|
In the above configuration - frps can be contacted on port 1337 with a HTTP CONNECT header such as:
|
|
|
|
|
|
```
|
|
|
CONNECT test1 HTTP/1.1\r\n\r\n
|
|
|
```
|
|
|
and the connection will be routed to `proxy1`.
|
|
|
|
|
|
### Connecting to frps via HTTP PROXY
|
|
|
|
|
|
frpc can connect to frps using HTTP proxy if you set OS environment variable `HTTP_PROXY`, or if `http_proxy` is set in frpc.ini file.
|
|
|
|
|
|
It only works when protocol is tcp.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[common]
|
|
|
server_addr = x.x.x.x
|
|
|
server_port = 7000
|
|
|
http_proxy = http://user:pwd@192.168.1.128:8080
|
|
|
```
|
|
|
|
|
|
### Range ports mapping
|
|
|
|
|
|
Proxy with names that start with `range:` will support mapping range ports.
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[range:test_tcp]
|
|
|
type = tcp
|
|
|
local_ip = 127.0.0.1
|
|
|
local_port = 6000-6006,6007
|
|
|
remote_port = 6000-6006,6007
|
|
|
```
|
|
|
|
|
|
frpc will generate 8 proxies like `test_tcp_0`, `test_tcp_1`, ..., `test_tcp_7`.
|
|
|
|
|
|
### Client Plugins
|
|
|
|
|
|
frpc only forwards requests to local TCP or UDP ports by default.
|
|
|
|
|
|
Plugins are used for providing rich features. There are built-in plugins such as `unix_domain_socket`, `http_proxy`, `socks5`, `static_file`, `http2https`, `https2http`, `https2https` and you can see [example usage](#example-usage).
|
|
|
|
|
|
Specify which plugin to use with the `plugin` parameter. Configuration parameters of plugin should be started with `plugin_`. `local_ip` and `local_port` are not used for plugin.
|
|
|
|
|
|
Using plugin **http_proxy**:
|
|
|
|
|
|
```ini
|
|
|
# frpc.ini
|
|
|
[http_proxy]
|
|
|
type = tcp
|
|
|
remote_port = 6000
|
|
|
plugin = http_proxy
|
|
|
plugin_http_user = abc
|
|
|
plugin_http_passwd = abc
|
|
|
```
|
|
|
|
|
|
`plugin_http_user` and `plugin_http_passwd` are configuration parameters used in `http_proxy` plugin.
|
|
|
|
|
|
### Server Manage Plugins
|
|
|
|
|
|
Read the [document](/doc/server_plugin.md).
|
|
|
|
|
|
Find more plugins in [gofrp/plugin](https://github.com/gofrp/plugin).
|
|
|
|
|
|
## Development Plan
|
|
|
|
|
|
* Log HTTP request information in frps.
|
|
|
|
|
|
## Contributing
|
|
|
|
|
|
Interested in getting involved? We would like to help you!
|
|
|
|
|
|
* Take a look at our [issues list](https://github.com/fatedier/frp/issues) and consider sending a Pull Request to **dev branch**.
|
|
|
* If you want to add a new feature, please create an issue first to describe the new feature, as well as the implementation approach. Once a proposal is accepted, create an implementation of the new features and submit it as a pull request.
|
|
|
* Sorry for my poor English. Improvements for this document are welcome, even some typo fixes.
|
|
|
* If you have great ideas, send an email to fatedier@gmail.com.
|
|
|
|
|
|
**Note: We prefer you to give your advise in [issues](https://github.com/fatedier/frp/issues), so others with a same question can search it quickly and we don't need to answer them repeatedly.**
|
|
|
|
|
|
## Donation
|
|
|
|
|
|
If frp helps you a lot, you can support us by:
|
|
|
|
|
|
frp QQ group: 606194980
|
|
|
|
|
|
### AliPay
|
|
|
|
|
|
|
|
|
|
|
|
### Wechat Pay
|
|
|
|
|
|
|
|
|
|
|
|
### PayPal
|
|
|
|
|
|
Donate money by [PayPal](https://www.paypal.me/fatedier) to my account **fatedier@gmail.com**.
|
