ECN (Re: [PLUG] Accessing Web sites)

[Jim Woodruff]

On Tue, 26 Nov 2002, Karl M. Hegbloom wrote:

>
> I don't think it's Mozilla at all.  I think it's ECN (explicit
> congestion notification).  Try this, as root:
>
> echo 0 > /proc/sys/net/ipv4/tcp_ecn
>

That did the trick.

> ... and see if it starts working.  If so, then either put that into a
> startup script, or if you have "/etc/sysctl.conf" (Debian) then add:
>
> net.ipv4.tcp_ecn = 0
>
> ... to it.  If you use some sort of firewall tool, like "fwbuilder", ECN
> should be explictly set to OFF in there as well.
>
> Apparently, ECN is fairly recent, and many firewalls drop packets with
> that option set.

Thus is probably my problem, I just recently installed the "shorewall"
firewall and need to tweek it some more. Thanks very much for the tips.

Jim

--
Jim Woodruff < jawoodruff at attbi.com >