tcpdump mailing list archives

Re: BPF filter for tcp syn for ipv6


From: Darren Reed <Darren.Reed () Sun COM>
Date: Thu, 11 Feb 2010 19:36:20 +0100

Ritesh Rekhi wrote:
Hi all,

I want to filter TCp syn packet which is coming using IPv6 addresses. I am not able to find the bpf filter for that can 
somebody help me to find the right BPF filter


I have already tried" tcp[tcpflags] & (tcp-syn) != 0" which doesn't work for IPv6 traffic.

What does "doesn't work for IPv6 traffic" mean?
No packets?
You continue to get all packets?
Which platform? Linux? BSD? Solaris?

Daren

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