Snort mailing list archives
BPF filter
From: "Liuhy" <solar_liu () fescomail net>
Date: Mon, 21 Apr 2003 15:33:11 +0800
Hello everyone, In the option of snort command line, there is a "-F", which is followed by a BPF filter file. I have googled it, I only know that it is the abbreviation of "Berkley Packet Filtering", these cann't give me the answer that I want to get. My questions are: 1. What is BPF filter? (not introduced in "man tcpdump", "man snort", I cann't enter "man 4 bpf in linux) 2. How can I write BPF filter file? what is the rules to write it? 3. In snort FAQ, there is an example as following: snort <options> ``not ( (icmp[0] = 8 or icmp[0] = 0) and host <foo>)'' It's similar to a snort command line, is it right? what is the relation of them? Thanks in advance! Liuhy 2003/4/21
Current thread:
- BPF filter Liuhy (Apr 21)
- Re: BPF filter Chris Reid (Apr 21)
- Re: BPF filter Edin Dizdarevic (Apr 21)