Re: I can't access some site with Mozilla
Christopher L. Everett wrote:
OK,
I git this problem only once in a while. Otherwise useful site that I
can't access that give me "connection refused" errors when Moz or
IE on a Windows box behind the same firewall as me works fine.
Here are 2 sample URLS:
http://www.mwave.com/
http://www.egain.com/
I realize that most likely these turkeys have a braindead (MS ISA? )
firewall in place. So how do I deal?
I think you may have a problem with ECN.
"Please note that kernel.org uses Explicit Congestion Notification
(ECN), as defined in RFC 3168. Some broken firewalls or gateways may
have problem connecting to ECN-enabled servers. Please contact your
firewall or gateway vendor for necessary updates."
I had the same problem connecting to my own router through it's
web-interface, thanks to ECN being enabled by default in kernel 2.6.x.
If I re-enable ECN, I can't access mwave.com either.
If I disable it again, I can.
To check your settings:
cat /proc/sys/net/ipv4/tcp_ecn
This will probably output: 1
To disable it, run:
echo 0 > /proc/sys/net/ipv4/tcp_ecn
And try connecting to e.g. mwave.com again.
To change this permanently, add:
net/ipv4/tcp_ecn=0
to /etc/sysctl.conf
Regards,
Felix
--
Felix Stegerman
the QuiX project - Open Source software
E-Mail: quix@free.fr
Web: http://www.quix.tk/
Reply to: