| [475ad56] | 1 | # FTP - File Transfer Protocol - RFC 959
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| 2 | # Pattern quality: great fast
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| 3 | #
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| 4 | # Usually runs on port 21. Note that the data stream is on a dynamically
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| 5 | # assigned port, which means that you will need the FTP connection
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| 6 | # tracking module in your kernel to usefully match FTP data transfers.
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| 7 | #
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| 8 | # This pattern is well tested. If it does not
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| 9 | # work for you, or you believe it could be improved, please post to
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| 10 | # l7-filter-developers@lists.sf.net . This list may be subscribed to at
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| 11 | # http://lists.sourceforge.net/lists/listinfo/l7-filter-developers
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| 12 | #
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| 13 | # Matches the first two things a server should say. Most servers say
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| 14 | # something after 220, even though they don't have to, and it usually
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| 15 | # includes the string "ftp" (l7-filter is case insensitive).
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| 16 | # This includes proftpd, vsftpd, wuftpd, warftpd, pureftpd, Bulletproof
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| 17 | # FTP Server, and whatever ftp.microsoft.com uses. Just in case, the next
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| 18 | # thing the server sends is a 331. All the above servers also send
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| 19 | # something including "password" after this code.
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| 20 | ftp
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| 21 | # actually, let's just do the first for now, it's faster
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| 22 | ^220[\x09-\x0d -~]*ftp
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| 23 |
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| 24 | # This is ~10x faster if the stream starts with "220"
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| 25 | #^220.*ftp
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| 26 |
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| 27 | # This will match more, but much slower
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| 28 | #^220[\x09-\x0d -~]*ftp|331[\x09-\x0d -~]*password
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| 29 |
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| 30 | # This pattern is more precise, but takes longer to match. (3 packets vs. 1)
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| 31 | #^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a331
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| 32 |
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| 33 | # same as above, but slightly less precise and only takes 2 packets.
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| 34 | #^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a
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