[Oisf-users] How to alert for a single TCP packet?

Lucas lama2 at cin.ufpe.br
Tue Nov 26 04:26:42 UTC 2019


Oh, i see. Thank you for the explanation.

And yes, i'm using the pcap and the rule i sent you.

I'm sorry, how can i find the "pcap snippet from the alert"?

This is the alert-debug log:

+================
TIME:              10/13/2019-17:40:38.739730
PKT SRC:           stream (flow timeout)
SRC IP:            1.2.3.4
DST IP:            192.168.1.108
PROTO:             6
SRC PORT:          33744
DST PORT:          80
TCP SEQ:           1004108996
TCP ACK:           1324967473
FLOW:              to_server: TRUE, to_client: FALSE
FLOW Start TS:     10/13/2019-17:40:38.739730
FLOW PKTS TODST:   1
FLOW PKTS TOSRC:   0
FLOW Total Bytes:  249
FLOW IPONLY SET:   TOSERVER: TRUE, TOCLIENT: FALSE
FLOW ACTION:       DROP: FALSE
FLOW NOINSPECTION: PACKET: FALSE, PAYLOAD: FALSE, APP_LAYER: FALSE
FLOW APP_LAYER:    DETECTED: TRUE, PROTO 1
PACKET LEN:        40
PACKET:
  0000  45 00 00 28 00 00 00 00  40 06 B4 B6 01 02 03 04   E..(.... @.......
  0010  C0 A8 01 6C 83 D0 00 50  3B D9 7C C4 4E F9 66 31   ...l...P ;.|.N.f1
  0020  50 10 0A 00 ED D1 00 00                            P.......
ALERT CNT:           1
ALERT MSG [00]:      Testing rule 0
ALERT GID [00]:      1
ALERT SID [00]:      1099019
ALERT REV [00]:      0
ALERT CLASS [00]:    <none>
ALERT PRIO [00]:     3
ALERT FOUND IN [00]: STATE
ALERT IN TX [00]:    0





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