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| author | Felix Fietkau <nbd@openwrt.org> | 2005-11-18 16:17:27 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2005-11-18 16:17:27 +0000 |
| commit | 4f330ac6d98dabd3a0710918f68cfdb8bcd38d9f (patch) | |
| tree | a7481f67f879a9177ede16fce6b062cca0ebcf3b /package/iptables/files/l7/ntp.pat | |
| parent | 72582c721989d47b78485678fef600a302962fa5 (diff) | |
| download | upstream-4f330ac6d98dabd3a0710918f68cfdb8bcd38d9f.tar.gz upstream-4f330ac6d98dabd3a0710918f68cfdb8bcd38d9f.tar.bz2 upstream-4f330ac6d98dabd3a0710918f68cfdb8bcd38d9f.zip | |
add layer7 patterns to iptables-mod-filter
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2519 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/iptables/files/l7/ntp.pat')
| -rw-r--r-- | package/iptables/files/l7/ntp.pat | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/package/iptables/files/l7/ntp.pat b/package/iptables/files/l7/ntp.pat new file mode 100644 index 0000000000..b7e443e21f --- /dev/null +++ b/package/iptables/files/l7/ntp.pat @@ -0,0 +1,17 @@ +# (S)NTP - (Simple) Network Time Protocol - RFCs 1305 and 2030 +# Pattern quality: good veryfast overmatch +# +# This pattern is tested and is believed to work. If this does not work +# for you, or you believe it could be improved, please post to +# l7-filter-developers@lists.sf.net . Subscribe at +# http://lists.sourceforge.net/lists/listinfo/l7-filter-developers + +# client|server +# Requires the server's timestamp to be in the present or future (of 2005). +# Tested with ntpdate on Linux. +# Assumes version 2, 3 or 4. + +# Note that ntp packets are always 48 bytes, so you should match on that too. + +ntp +^([\x13\x1b\x23\xd3\xdb\xe3]|[\x14\x1c$].......?.?.?.?.?.?.?.?.?[\xc6-\xff]) |