[KLUG Members] Connection reset by peer

[Peter Buxton]

Hello, there. I'm having a *terrible* time with CARES' server. The
problems started Monday, when various applications started losing
connectivity. Basically, what happens is, say during an ssh session, the
shell simply drops (usually freezing on the server side) and puTTY says,
"Connection reset by peer." This is terrible: it affects Samba, Exim
(MTA), and sshd. Once, I was inside CARES 192. network, logged into the
server from a WinXP box, and logged into killdevil and then CARES on top
of that. The killdevil-to-cares session died, but my direct session was
perfectly functional.

Setting a cron job to ping the printer revealed that network connectivity
suffers many small losses dispersed over time.

Usually, you can ping the server even while 'telnet server 25' fails to
call up the mail server.

This distro is Debian testing. The kernel was a hand-compiled 2.4.18,
which had been up for 80 days or so before I eventually tried rebooting to
fix it. I installed a standard Debian i386 2.4.19 kernel-image, same
problem. Replaced the Thunderlan 10/100 (this was a Compaq Proliant P-166)
with another card, moved the drives into a new server box, installed the
server on another net point, replaced the freakin' network hub (Compaq
Netelligent 10BaseT repeater for DLink 10/100 switch) -- and I just got
another error after that last replacement. True, the number of drops, with
the new switch, has been drastically reduced, and perhaps that last drop
was a goodbye, but.... :-(

Read from remote host cares.wmis.net: Connection reset by peer
Connection to cares.wmis.net closed.      Да
grimace:08:51:40:~$ ssh cares.wmis.net
ssh: connect to host cares.wmis.net port 22: Connection refused
grimace:08:51:42:~$

Standalone:

Samba   2.2.3a-6
DHCP    2.0p15-14
BIND    9.2.1-4
hylafax 4.1.1-1
lprng   3.8.15-1

>From inetd:

qpopper 4.0.4-5
exim    3.36-3

None of these services use tcpd (one of my first thoughts).

Basically, I'm trolling through /proc/sys/net/ipv4 to see if I can see any
values freakily different from my home machine (Debian unstable, and
displays NONE of the problems CARES is having).

-- 
for gpg key - http://www.killdevil.org/~peter
You can fill my head with Gummi Bears,
but I won't talk! -- Tom Servo, K13.