2005-11-18 16:17:27 +00:00
|
|
|
# (S)NTP - (Simple) Network Time Protocol - RFCs 1305 and 2030
|
2007-11-19 23:07:00 +00:00
|
|
|
# Pattern attributes: good fast fast overmatch
|
|
|
|
|
# Protocol groups: time_synchronization ietf_draft_standard
|
|
|
|
|
# Wiki: http://www.protocolinfo.org/wiki/NTP
|
2005-11-18 16:17:27 +00:00
|
|
|
#
|
2007-11-19 23:07:00 +00:00
|
|
|
# This pattern is tested and is believed to work.
|
2005-11-18 16:17:27 +00:00
|
|
|
|
|
|
|
|
# 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])
|
