mirror of https://github.com/fail2ban/fail2ban
51 lines
2.2 KiB
Plaintext
51 lines
2.2 KiB
Plaintext
# Fail2Ban filter for exim
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#
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# This includes the rejection messages of exim. For spam and filter
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# related bans use the exim-spam.conf
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#
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[INCLUDES]
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# Read common prefixes. If any customizations available -- read them from
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# exim-common.local
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before = exim-common.conf
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[Definition]
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prefregex = ^%(__prefix_line)s<F-CONTENT>.+</F-CONTENT>$
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failregex = ^%(host_info)s sender verify fail for <\S+>: (?:Unknown user|Unrouteable address|all relevant MX records point to non-existent hosts)\s*$
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^\s?\w+ authenticator failed for%(host_info)s: 535 Incorrect authentication data(?: \(set_id=.*\)|: \d+ Time\(s\))?\s*$
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^%(host_info)s rejected RCPT [^@]+@\S+: (?:relay not permitted|Sender verify failed|Unknown user|Unrouteable address)\s*$
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^\s?SMTP protocol synchronization error \([^)]*\): rejected (?:connection from|"\S+")%(host_info)s (?:next )?input=".*"\s*$
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^\s?SMTP call from%(host_info)s dropped: too many (?:(?:nonmail|unrecognized) commands|syntax or protocol errors)
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^\s?SMTP protocol error in "[^"]+(?:"+[^"]*(?="))*?"%(host_info)s [A-Z]+ (?:command used when not advertised|authentication mechanism not supported)\s*$
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^\s?no MAIL in SMTP connection from%(host_info)s
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^\s?(?:[\w\-]+ )?SMTP connection from%(host_info)s closed by DROP in ACL\s*$
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<mdre-<mode>>
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mdre-aggressive = ^\s?no host name found for IP address <ADDR>$
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^\s?no IP address found for host \S+ \(during SMTP connection from%(host_info)s\)$
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mdre-normal =
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# Parameter `mode` - `normal` or `aggressive`.
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# Aggressive mode can be used to match flood and ddos-similar log-entries like:
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# 'no host found for IP', 'no IP found for host'.
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# Note this is not an authentication failures, so it may produce lots of false
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# positives on misconfigured MTAs.
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# Ex.:
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# filter = exim[mode=aggressive]
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mode = normal
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ignoreregex =
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# DEV Notes
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# -----------
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# The %(host_info) definition contains a <ADDR> match. No space before. See exim-common.conf
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#
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# SMTP protocol synchronization error \([^)]*\) <- This needs to be non-greedy
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# to void capture beyond ")" to avoid a DoS Injection vulnerability as input= is
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# user injectable data.
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