ssh problem

[davydesmet]

Hi,

I'm NO Linux expert, but we have some Linux servers at work. Now there is a problem with 1 of them. SSH only works when entering this command:

exec /usr/sbin/sshd -d

you get 1 session and that's it.

I checked and ssh is running (before executing the exec command). The message states connection refused.

As adviced I allready cleared the known_hosts file, but this didn't work. I don't think it's an issue with port 22, as I CAN connect given the above command.

Any ideas?

thanks

Davy

[Irithori]

hi and welcome

-d is the debug mode. sshd will not become a daemon and only serve one connection, as you experience.
Manual Pages: sshd(

Dont use that exec line, instead start sshd via its init script.

[davydesmet]

well, that's the problem. it only works in debug mode...

[Irithori]

Ok, so what was changed on that server or for sshd?
What happens, if you start sshd via init?

/etc/init.d/ssh restart

You can test the configfile with

sshd -t

or

sshd -T

and look for errors in /var/log/auth.log (debian default)

Note:
sshd -T will write the configfile to stdout if no syntax error is found.

[davydesmet]

thanks mate, it works.

error message: fatal: daemon() failed: No such device

I did this:

remove /dev/null
and then: "mknod /dev/null c 1 3"

and it works!