OpenSSH / SunSSH compatability issue

[wiffporkins]

In my network, I have a central Solaris server with a handful of linux machines accessing the server and each other.

After upgrading three of these machines to Fedora 9, I have not been able to ssh into these three machines with the central server; however, I have been able to ssh into the Fedora 9 machines with older versions of Fedora and OpenSSH.

Interestingly enough, I have been able to ssh from these machines into the central Solaris server with no problem, just not the other way around.

I think the problem occurs when SunSSH (version 1.0.1) tries to ssh into the Fedora 9 machines running OpenSSH 5.0. Anybody else having a similar problem? Thanks in advance.

[EnglandA]

Perhaps a known_host's issue?

[Nokia]

Run ssh in verbose mode to see what's wrong. In OpenSSH, that means

ssh -v IP

Find out how it's done in Solaris by checking it's man page. As EnglandA implied, it might be a known_hosts issue - that would mean existing ssh keys known in Solaris to be different/changed due to those upgrades. If that's the case, simply delete those keys for the respective IP's

[wiffporkins]

I'll look into those ssh keys later today when I get the chance.

In the meantime, this is what I was getting when running ssh in verbose mode.

And don't worry, I'm using a more creative naming scheme, I just changed the names to keep it simple to trace =)

wiffporkins_on_SolarisServer:/home/wiffporkins% ssh -v root@Fedora9Box 
SSH Version Sun_SSH_1.0.1, protocol versions 1.5/2.0. 
debug1: Reading configuration data /etc/ssh/ssh_config 
debug1: Rhosts Authentication disabled, originating port will not be trusted. 
debug1: ssh_connect: getuid 501 geteuid 501 anon 1 
debug1: Connecting to Fedora9Box [ip.address] port 22. 
debug1: Connection established. 
debug1: identity file /home/wiffporkins/.ssh/identity type 3 
debug1: identity file /home/wiffporkins/.ssh/id_rsa type 3 
debug1: identity file /home/wiffporkins/.ssh/id_dsa type 3

At this point, ssh hangs and the connection is never completed.

[Nokia]

If just hangs after this, I'd suggest checking the firewall in F9. I don't know if it's the same as in F8, but you can try

su -
system-config-firewall-tui

See if ssh is allowed (TCP 22)

[wiffporkins]

Firewall is disabled and Port 22 is open, but still no dice.

I'm gonna sniff around with Wire Shark today and see if that doesn't tell me anything.