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Merge pull request #2630 from fail2ban/gh-2200-postfix 

filter.d/postfix.conf: extended mode ddos and aggressive covering multiple disconnects without auth
pull/2638/head
Sergey G. Brester 2020-02-11 12:44:21 +01:00 committed by GitHub
parent 34d63fccfe 88cf5bcd93
commit d7643fe538
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2 changed files with 6 additions and 1 deletions
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2
config/filter.d/postfix.conf
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@ -37,7 +37,7 @@ mdre-rbl = ^RCPT from [^[]*\[<HOST>\]%(_port)s: [45]54 [45]\.7\.1 Service unava
mdpr-more = %(mdpr-normal)s
mdre-more = %(mdre-normal)s
mdpr-ddos = lost connection after(?! DATA) [A-Z]+
mdpr-ddos = (?:lost connection after(?! DATA) [A-Z]+|disconnect(?= from \S+(?: \S+=\d+)* auth=0/(?:[1-9]|\d\d+)))
mdre-ddos = ^from [^[]*\[<HOST>\]%(_port)s:?
mdpr-extra = (?:%(mdpr-auth)s|%(mdpr-normal)s)

5
fail2ban/tests/files/logs/postfix
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@ -137,6 +137,11 @@ Jan 14 16:18:16 xxx postfix/smtpd[14933]: warning: host[192.0.2.5]: SASL CRAM-MD
# filterOptions: [{"mode": "ddos"}, {"mode": "aggressive"}]
# failJSON: { "time": "2005-02-10T13:26:34", "match": true , "host": "192.0.2.1" }
Feb 10 13:26:34 srv postfix/smtpd[123]: disconnect from unknown[192.0.2.1] helo=1 auth=0/1 quit=1 commands=2/3
# failJSON: { "time": "2005-02-10T13:26:34", "match": true , "host": "192.0.2.2" }
Feb 10 13:26:34 srv postfix/smtpd[123]: disconnect from unknown[192.0.2.2] ehlo=1 auth=0/1 rset=1 quit=1 commands=3/4
# failJSON: { "time": "2005-02-18T09:45:10", "match": true , "host": "192.0.2.10" }
Feb 18 09:45:10 xxx postfix/smtpd[42]: lost connection after CONNECT from spammer.example.com[192.0.2.10]
# failJSON: { "time": "2005-02-18T09:45:12", "match": true , "host": "192.0.2.42" }