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18 lines
649 B
Plaintext
18 lines
649 B
Plaintext
# (S)NTP - (Simple) Network Time Protocol - RFCs 1305 and 2030
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# Pattern attributes: good fast fast overmatch
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# Protocol groups: time_synchronization ietf_draft_standard
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# Wiki: http://www.protocolinfo.org/wiki/NTP
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# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE
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#
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# This pattern is tested and is believed to work.
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# client|server
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# Requires the server's timestamp to be in the present or future (of 2005).
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# Tested with ntpdate on Linux.
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# Assumes version 2, 3 or 4.
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# Note that ntp packets are always 48 bytes, so you should match on that too.
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ntp
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^([\x13\x1b\x23\xd3\xdb\xe3]|[\x14\x1c$].......?.?.?.?.?.?.?.?.?[\xc6-\xff])
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