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35 lines
1.5 KiB
Plaintext
# FTP - File Transfer Protocol - RFC 959
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# Pattern quality: great fast
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#
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# Usually runs on port 21. Note that the data stream is on a dynamically
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# assigned port, which means that you will need the FTP connection
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# tracking module in your kernel to usefully match FTP data transfers.
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#
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# This pattern is well tested. If it does not
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# work for you, or you believe it could be improved, please post to
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# l7-filter-developers@lists.sf.net . This list may be subscribed to at
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# http://lists.sourceforge.net/lists/listinfo/l7-filter-developers
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#
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# Matches the first two things a server should say. Most servers say
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# something after 220, even though they don't have to, and it usually
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# includes the string "ftp" (l7-filter is case insensitive).
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# This includes proftpd, vsftpd, wuftpd, warftpd, pureftpd, Bulletproof
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# FTP Server, and whatever ftp.microsoft.com uses. Just in case, the next
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# thing the server sends is a 331. All the above servers also send
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# something including "password" after this code.
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ftp
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# actually, let's just do the first for now, it's faster
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^220[\x09-\x0d -~]*ftp
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# This is ~10x faster if the stream starts with "220"
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#^220.*ftp
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# This will match more, but much slower
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#^220[\x09-\x0d -~]*ftp|331[\x09-\x0d -~]*password
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# This pattern is more precise, but takes longer to match. (3 packets vs. 1)
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#^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a331
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# same as above, but slightly less precise and only takes 2 packets.
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#^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a
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