add layer7 patterns to iptables-mod-filter

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2519 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 34 insertions, 0 deletions

diff --git a/package/iptables/files/l7/ftp.pat b/package/iptables/files/l7/ftp.pat
new file mode 100644
index 0000000000..9593ffd1bd
--- /dev/null
+++ b/package/iptables/files/l7/ftp.pat
@@ -0,0 +1,34 @@
+# FTP - File Transfer Protocol - RFC 959
+# Pattern quality: great fast
+#
+# Usually runs on port 21.  Note that the data stream is on a dynamically
+# assigned port, which means that you will need the FTP connection 
+# tracking module in your kernel to usefully match FTP data transfers.
+# 
+# This pattern is well tested.  If it does not
+# work for you, or you believe it could be improved, please post to 
+# l7-filter-developers@lists.sf.net .  This list may be subscribed to at
+# http://lists.sourceforge.net/lists/listinfo/l7-filter-developers
+#
+# Matches the first two things a server should say.  Most servers say 
+# something after 220, even though they don't have to, and it usually
+# includes the string "ftp" (l7-filter is case insensitive).
+# This includes proftpd, vsftpd, wuftpd, warftpd, pureftpd, Bulletproof 
+# FTP Server, and whatever ftp.microsoft.com uses.  Just in case, the next 
+# thing the server sends is a 331.  All the above servers also send 
+# something including "password" after this code.
+ftp
+# actually, let's just do the first for now, it's faster
+^220[\x09-\x0d -~]*ftp
+
+# This is ~10x faster if the stream starts with "220"
+#^220.*ftp
+
+# This will match more, but much slower
+#^220[\x09-\x0d -~]*ftp|331[\x09-\x0d -~]*password
+
+# This pattern is more precise, but takes longer to match. (3 packets vs. 1)
+#^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a331
+
+# same as above, but slightly less precise and only takes 2 packets.
+#^220[\x09-\x0d -~]*\x0d\x0aUSER[\x09-\x0d -~]*\x0d\x0a