Subject: weird network delays connecting to cable provider's servers...
To: None <email@example.com>
From: Luke Mewburn <firstname.lastname@example.org>
Date: 04/06/1999 20:27:00
hi tcp gurus.
i've got a weird problem with my cable setup, which i'd like to
resolve because i'd prefer to have a netbsd box as a firewall/ipnat
box than have my wife's nt box sit directly on the internet.
* working network config:
ntbox <-> cable modem <-> cable isp <-> internet
the ntbox can download stuff from both the cable isp's hosts and the
internet at `high' speed (> 200k/s)
* non-working network config:
netbsdbox <-> cable modem <-> cable isp <-> internet
the netbsdbox downloads stuff from the internet at `high' speed,
yet from the cable isp's servers at ~ 1 kb/s (yes, that slow!)
as you can understand, this is extremely annoying, since i need to
talk to my cable isp's servers to download email via pop for free
(as opposed to A$0.36/MB which is what they *gouge* me for everything
anyone seen any similar behaviour? if not, is there any tcpdumping et
al i can do of connections to borken vs non-borken hosts that someone
can analyse to help work out why.
at avalon's suggestion i tried tweaking
net.inet.ip.mtudisc=1 (was 0)
net.inet.tcp.mssdflt=1400 (was 512)
but that didn't help. neither did disabling rfc1323 (which is a badly
documented option, btw).