[Bro] Regarding signatures

Ayyappa Suryanarayana T ayyappa at tataelxsi.co.in
Fri Mar 9 03:53:35 PST 2007

Hi all,

      I am having trouble matching same signature for packets in different connections,its matching one connection but its not matching for another connection but the packets have same payload.

The signature that is to be matched is the following:
signature gtalk_test {
  event "gtalk test received"
  payload /\x17\x03\x01/

I tried the following signature also

signature gtalk_one {
  event "gtalk one received"
  payload /.{0,0}\x17/
  payload /.{1,1}\x03/
  payload /.{2,2}\x00/

The pcap that is not matching is attached along with this mail.

can any one help me to know how the signature matching happens in bro-1.2.1

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