Date: Wed, 9 Nov 2005 21:49:41 -0500 From: "J.R. Oldroyd" <jr@opal.com> To: Sean McNeil <sean@mcneil.com> Cc: ume@freebsd.org, current@freebsd.org Subject: Re: recent MFC code to 6-STABLE kills ipv6 Message-ID: <20051110024941.GA987@linwhf.opal.com> In-Reply-To: <1131424479.1341.3.camel@server.mcneil.com> References: <1131161768.8571.9.camel@server.mcneil.com> <ygehdaqhnnv.wl%ume@mahoroba.org> <8427EC93-6788-4659-B769-3703FF2AAA9A@mcneil.com> <x7acgim9hi.wl%suz@alaxala.net> <1131359967.1874.6.camel@server.mcneil.com> <x7mzkfsy87.wl%suz@alaxala.net> <1131424479.1341.3.camel@server.mcneil.com>
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Experiencing the problem over here, too.
# ifconfig gif0
gif0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1280
tunnel inet 66.171.79.118 --> 64.86.88.116
inet6 2001:5c0:8fff:fffe::553 --> 2001:5c0:8fff:fffe::552 prefixlen 128
inet6 fe80::20c:6eff:fe75:69aa%gif0 prefixlen 64 scopeid 0x5
# ping6 2001:5c0:8fff:fffe::553
PING6(56=40+8+8 bytes) 2001:5c0:8fff:fffe::553 --> 2001:5c0:8fff:fffe::553
16 bytes from 2001:5c0:8fff:fffe::553, icmp_seq=0 hlim=64 time=1.658 ms
16 bytes from 2001:5c0:8fff:fffe::553, icmp_seq=1 hlim=64 time=0.720 ms
16 bytes from 2001:5c0:8fff:fffe::553, icmp_seq=2 hlim=64 time=0.681 ms
^C
Ping6 works fine:
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.
-jr
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