temporarily hanging and broken connections on lan
Hello,
I have had a network problem develop since I moved from RedHat 7 to
Debian. Typically what I do is run an X server on an Win 2000 laptop
(usually XFree86 but sometimes Exceed. Doesn't make a difference),
ssh into my local linux box and work that way.
The problem is that sometimes my sessions hang fro several minutes and
then come back. Often I just get connection reset by peer messages
from my ssh processes.
I have also observed that on rare occaisions, the network on my Win
2000 box is hosed, so that I have to disable and reenable the network
or else reboot my laptop. This makes me wonder if the problem is with
Win 2000. But I never observed the behavior before Debian.
When switching to Debian, I had trouble with an old ISA 3com card that
was my eth1. I swapped it out with a NetGear which, as I recall is
tulip chipset (I think it is the CONFIG_DEC_ELCP configuration flag).
I've done things like strace my sshds and run netgrep to log ethernet
packets on the local net, but I haven't noticed anything suspicious.
My linux box runs ipchains to protect the local net and I think the
configuration is solid. However, when I first installed Debian I was
accepting sshd connections on the linux box for several days. Right
now, I only accept sshd connections from the lan and from a single
computer at work.
Sometimes, when the connections have hung, I've gone down to the
basement (where the linux box is) to check things out and haven't
noticed anything wrong. Top indicates insignificant CPU load.
Oh, I run dnsmasq for name resolution on the lan. I also run samba.
The Win 2000 computer normally uses a Cisco wireless card, but I
switched to a wire for a few days and still had the problem.
I have also tried switching ports on my Netgear hub in the basement
and also swapped out cables between the Dlink wireless access point
and the hub.
Can anyone offer suggestions on how to isolate this or what this might
be? Thanks very very much. Despite this problem, I have become very
fond of Debian. I tend not to believe that this is a Debian problem.
But it started within a day or two of making the switch.
Thanks again.
--
John M. Adams
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