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[Snort-users] drop a packet from a preprocessor

from [David Cann] Network Security [Permanent Link]
Subject: [Snort-users] drop a packet from a preprocessor
Date: Fri, 28 Apr 2006 18:49:51 -0400
If I wanted to write a preprocessor to do nothing but drop a packet of type ICMP, is the following code correct?

if ( p->iph->ip_proto == 1 ) {
   InlineDrop();
}

Is this correct? I'm running snort in Inline-mode, but this InlineDrop() command doesn't seem to kill the packet. Ideally I want to send a "reject" command back to iptables, but "drop" would also be sufficient.

Note, I have all the regular preprocessor boilerplate code, all I need to figure out is this one bit

Thanks,
--D


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