Very strange problem

I have a linux box that I was using as a webserver connected to an
isdn router that worked great. I just tapped into my neighbors who
have a wireless ISP but something is strange. I run an ethernet line
from my neighbors 10.x router to another router which serves te 192.x
subnet where my webserver lives. Port forwarding is turned on for
port 80.

Now from the internet, I can server up any page that is 1k or smaller
- anything else causes the browser to spin forever. I could not find
anything in the router gui to see a bottleneck - could my ISp be doing
this?

On 2004-02-23, nikko <(E-Mail Removed)> wrote:
> [naughty naughty-ness]
>
> Now from the internet, I can server up any page that is 1k or smaller
> - anything else causes the browser to spin forever. I could not find
> anything in the router gui to see a bottleneck - could my ISp be doing
> this?
>
Set your MTU to about 1410 or less:

ifconfig eth0 mtu 1410

where eth0 is whatever the NIC is you are using. This should really be fixed
with Path-MTU discovery (in /proc/sys/net/ipv4/conf/ ) but for some reason is
not working for you.

Have fun

Alex

Alexander Clouter wrote:
> On 2004-02-23, nikko <(E-Mail Removed)> wrote:
>
>>[naughty naughty-ness]
>>
>>Now from the internet, I can server up any page that is 1k or smaller
>>- anything else causes the browser to spin forever. I could not find
>>anything in the router gui to see a bottleneck - could my ISp be doing
>>this?
>>
>
> Set your MTU to about 1410 or less:
>
> ifconfig eth0 mtu 1410
>
> where eth0 is whatever the NIC is you are using. This should really be fixed
> with Path-MTU discovery (in /proc/sys/net/ipv4/conf/ ) but for some reason is
> not working for you.
>

I have heard that there are clueless netadmins blocking all ICMP
messages to get rid of ping probing. Maybe it's working here?

Tauno Voipio
tauno voipio @ iki fi