After installing Ubuntu Server 10.04.1 on a new x86_64 kvm instance (Debian
6.0 hosted) I'm getting -apparently- ramdon disconnects from the server.
Read from remote host myserver:
Connection reset by peer Connection to
myserver closed
All TCP connections are dropped (ie. ssh and MySQL server) but icmp traffic
still gets accepted and responded to (ping works fine all the time).
% ssh myserver ssh: connect to host
myserver port 22: Connection refused% ssh myserver ssh: connect to host
myserver port 22: Connection refused% ssh myserver ssh: connect to host
myserver port 22: Connection refused[…]
10 to 20 seconds after, I can, "magicaly", connect normally again.
I've checked dmesg, messages, auth and syslog logfiles, nothing appears on
them (no failed connections attempts are shown).
If I install the OS directly on the physical server (a Dell 2950) I get exactly the same extrange behaviour, which leads me to think that
may be an OS config/bug related problem.
My laptop, as well as the rest of the clients, are on the same subnet as the
server connected to the same switch, no routing or other networking devices
are involved.
No iptables or other firewall is configured.
Has anyone faced a similar problem? Any suggestions on how I can deeply troubleshoot this?
Best Answer
The first thing I would check is if you have any other machines with the same IP on the network. If so, they'll send RST to any TCP traffic they don't recognise which will cause what you're seeing.