Do you have a host-based firewall running?  ip6tables perhaps?

ip6tables -L

John
=========================================
John Jason Brzozowski
Comcast Corporation
e) mailto:[email protected]
m) 609-377-6594
=========================================


> From: Robert Moskowitz <[email protected]>
> Date: Mon, 30 Mar 2009 17:56:50 -0400
> To: "[email protected]" <[email protected]>
> Subject: Problems accessing www.ietf.org over IPv6
> 
> I have a /48 native IPv6 prefix routed to my home lab.
> 
> I come back from IETF, and Firefox 3.0.6 is hanging accessing
> www.ietf.org on my duo-stack Centos 5.2 laptop.
> 
> I do a ping6 and can get to www.ietf.org, so it is not a routing
> problem.  I run wireshark and I see IPv4 and IPv6 tcp sessions.
> 
> In the end I have to disable IPv6 in Firefox to get to the ietf home
> page.  Doesn't see right, I had no trouble with this at the meeting and
> all I did was suspend my system to go home.  I rebooted here (horrors,
> rebooting a Linux system) jsut to see if there was something hanging
> around from ietf.
> 
> 
> 
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