Snort mailing list archives
How snort handels contents divided in multiple packets?
From: Hamza Ali via Snort-users <snort-users () lists snort org>
Date: Mon, 28 May 2018 14:35:37 +0200
Hello, I am learning snort so sorry if its a very basic question. Consider the rule: alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS ( msg:"MALWARE-CNC"; flow:to_server,established; content:"HELLO",depth 6; content:"MATE",depth 4,offset 7; sid:42129; rev:1; ) Basically, if "HELLO" and "MATE" are seen in the specified locations in the same packet on the given four-tuple, the alert will trigger. My question is what will happen if "HELLO" is sent in the first packet and "MATE" is sent in the second packet. Since both contents have to be present in the same packet according to the rule, the rule will not fire but the message will be transmitted. How will snort deal with this scenario? Thanks
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- How snort handels contents divided in multiple packets? Hamza Ali via Snort-users (May 29)