[Gllug] Barclays routers don't support ECN

[Grzegorz Jaskiewicz]

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On Thursday 10 of July 2003 15:16, Rev Simon Rumble wrote:
> I've been banging my head against this strange problem with the
> Barclays web site.  It just wouldn't fscking work, yet every other
> site on the net did.
>
> simon at chimay:~$ telnet www.barclays.co.uk 80
> Trying 193.128.3.187...
> Trying 62.172.239.187...
> telnet: Unable to connect to remote host: Connection timed out
>
> Finally I had a brain wave and remembered I'd turned ECN on.  I
> haven't noticed any other problem sites, but it appears Barclays have
> old crappy router firmware...
>
> To turn off ECN, you either set the kernel option to "no" (the
> default) or do this:
>
> echo 0 > /proc/sys/net/ipv4/tcp_ecn
>
> If you're a Barclays customer, you might want to log a support call
> asking them to upgrade their routers.
Not only they. I am running few email servers, and after upgrade from 2.2 to 
2.4 few of my clients got reply that since server is not able to connect to 
host on port 25 email cannot be delivered. This was due to broken 
routers/VPNs in peer network.... i had to turn it off as well.

- -- 
Grzegorz Jaskiewicz
K4 Labs
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