Re: can't go to certain web sites?
On Mon, Jul 23, 2001 at 10:05:31PM +0200, Juergen Kreileder wrote:
> Andy Wettstein <awettstein@cait.org> writes:
>
> > Here's a weird one. I've got a friend using Debian on ultra 5, but
> > he can't access certain web sites. Notably www.sun.com, but he can
> > access several other sites sites. He has tried mozilla, opera,
> > konqueror, and lynx and all of them have the same problems. They
> > just sit there and time out after a while. The only thing I see
> > that is odd is that on a dmesg there are lines and lines of this:
> >
> > hw tcp v4 csum failed
> >
> > Has anyone else had a problem like this? This doesn't seem normal.
>
> Disable ECN: echo 0 > /proc/sys/net/ipv4/tcp_ecn
That's weird. How come that is enable by default on the debian sparc
kernel, but not the debian x86 kernel?
>
> ,----[ linux/Documentation/Configure.help ]
> | [...]
> | CONFIG_INET_ECN
> | Explicit Congestion Notification (ECN) allows routers to notify
> | clients about network congestion, resulting in fewer dropped packets
> | and increased network performance. This option adds ECN support to the
> | Linux kernel, as well as a sysctl (/proc/sys/net/ipv4/tcp_ecn) which
> | allows ECN support to be disabled at runtime.
> |
> | Note that, on the Internet, there are many broken firewalls which
> | refuse connections from ECN-enabled machines, and it may be a while
> | before these firewalls are fixed. Until then, to access a site behind
> | such a firewall (some of which are major sites, at the time of this
> | writing) you will have to disable this option, either by saying N now
> | or by using the sysctl.
> |
> | If in doubt, say N.
> | [...]
> `----
>
>
> Juergen
>
> --
> Juergen Kreileder, Blackdown Java-Linux Team
> http://www.blackdown.org/java-linux.html
> Run Java 2 SE v1.3.1 on your iPAQ:
> http://www.handhelds.org/pipermail/ipaq/2001-June/007221.html
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