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Old 06-21-2011, 12:54 AM   #1
Registered: May 2004
Posts: 175

Rep: Reputation: 15
ssh: connect to host port 22: Connection timed out

I have 5 virtual machines, ranging from server01 to server05 based on virtualbox 4.0.2_OSEr35621, located at the same network section. The network config for 5 machines looks like

# Host is Debian server
# The config value has been changed.
iface eth0 inet static
address # other machines would be
My problem is sometimes connecting from server01 to other 4 machines (server02~server05) would be broken.

SSH client would print
ssh: connect to host server02 port 22: Connection timed out
The debug output of ssh client (ssh -vvv user@server02)
OpenSSH_5.5p1 Debian-5+b1, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to server02 [] port 22.
debug1: connect to address port 22: Connection timed out
ssh: connect to host server02 port 22: Connection timed out
The weird thing is the connection to server02 from host machine (which is also Debian) would not have e.g. borken pipes issue. So the ssh connection (host-> server02) works ok whilst connection from server01 to server02 returns timeout.

It seems to me the root cause might be underlying routing issue. But where can I check the log/ information to find out exactly what happened?

Old 06-21-2011, 12:07 PM   #2
Registered: Jul 2007
Location: Oregon
Distribution: Gentoo/Fedora/SLES
Posts: 40

Rep: Reputation: 15
Looks to me like your IP address and gateway are set the same on your server01. That could be causing all sorts of havoc. Especially if the other systems also have set as their gateway.


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