3c905 with new kernels wont load certain web sites...

David david@kalifornia.com
Wed Jun 16 12:21:37 1999


Austen McDonald wrote:

>         No, its not name resolution.  I can ping "metalab.unc.edu" and a
> lot of other sites work fine.  Also, I can get all sites to work when I
> use PPP w/ my modem.  That makes me think theres something wrong with the
> network card setup/driver.

drop your MTU setting to 1460, if that doesn't work, drop to 576 then slowly
increase it.

use MTU w/ ifconfig, MSS with route.  the easiest way to do it, is on your default
route command, add so it is like..:

    route add default gw ..........   mss 576

the technical answer is that there is probably a firewall somewhere upstream of
you that is dropping certain types of ICMP which breaks PMTU (path MTU).  PMTU
discovers the maximum segment size that both ends can handle.  by forcing the max
to remain small, you can fairly guarantee connectivity.

-d

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