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From: Sean McNeil <sean@mcneil.com>
To: SUZUKI Shinsuke <suz@freebsd.org>
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Organization: Sean McNeil Consulting, Inc
Date: Wed, 09 Nov 2005 19:13:03 -0800
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Cc: jr@opal.com, ume@freebsd.org, current@freebsd.org
Subject: Re: TCPv6 unexpectedly dropped by PF / Re: recent MFC code to
	6-STABLE kills ipv6
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On Wed, 2005-11-09 at 18:59 -0800, SUZUKI Shinsuke wrote:
> #I changed the ML title, since it's a different problem from Sean's
> #one.
> 
> >>>>> On Wed, 9 Nov 2005 21:49:41 -0500
> >>>>> jr@opal.com("J.R. Oldroyd")  said:
> 
> > However TCP traffic is broke, for example, when I try to telnet to the POP3
> > server here, I observe that pf is blocking the server's response packets with
> > this error:
> > 
> > # telnet 2001:5c0:8fff:fffe::553 110
> > Trying 2001:5c0:8fff:fffe::553...
> > ^C
> > 
> > from pflog:
> > 21:45:03.080452 rule 0/0(match): block in on gif0: 2001:5c0:8fff:fffe::553.110 > 2001:5c0:8fff:fffe::553.56716:  tcp 36 [bad hdr length 8 - too short, < 20]
> > 
> > This did not happen on earlier 6.0-current.
> 
> Could you please tell me the specific PF rule which caused the above match?

My bet is on norevpath :)