> > The w95 client can not negotiate proper TCP sessions with a handful of
> > sites on the Internet. An example is "www.metacrawler.com". The first
> > half-dozen packets or so are exchanged, but the connection simply hangs
> > forever after that. Turning on/off pmtu with
> > /proc/sys/net/ipv4/ip_no_pmtu_disc does NOT solve the problem.
>
> There is nothing you can do but use 1500 MTU or ignore these sites. Basically
I have heard this a few times, but there is something that still doesn't
add up for me. If it were solely a PMTU problem on the remote end,
wouldn't that bar my own system from communicating with them also? In my
case, my Linux box has no troubles reaching the sites; only the masqueraded
systems behind it do.
> > experimented with other values and the problem does not go away. Because
> > this is a slow link, I'd like to use a smaller MRU.
>
> Take it up with the site owners, ask them why they are running path mtu
> discovery and blocking all incoming icmp. Suggest they dial in with <1500 mtu
> and actually -test- their stuff.
I would like to, but since the only way to reproduce the problem is with a
system masqueraded behind a Linux box with PPP MTU<1500, I'm not sure if
they'll be able/willing to test it. If anyone else on the list has a setup
similar to mine and using MTU<1500, what happens when your masqueraded
clients try connecting to www.metacrawler.com?
thanks,
-bp
-- B. James Phillippe <bryan@terran.org> Linux Software Engineer, WGT Inc. http://earth.terran.org/~bryan
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