ssh works good from LAN but can't login from WAN

akrawiec · 01-08-2007, 10:58 AM

I use Suse SLED 10. SSH works good from LAN, but can't connect from WAN.
hosts.allow and hosts.deny are empty. Port 22 is redirected in my router correctly. I tried another ports (50022..) I looks like Linux ignore packets incoming from WAN. I tried to connect with VNC and there is the same problem - works from LAN but can't connect from WAN. The Linux firewall is turned off.
Has anyone any idea?

asommer · 01-08-2007, 11:15 AM

Is there some type of firewall on your router? Or anything that might be cathing it at the router.

You might try tcpdump to see if the traffic is coming through. Another thing (if you're able to) would be to place your box in front of the router temporarily and see if you can connect.

hockeyman_102 · 01-08-2007, 11:18 AM

ya, you might need a port forward on your router. I like the idea of putting it before your router and testing it.

mi6 · 01-08-2007, 02:33 PM

How are you testing WAN connectivity? If your router doesn't support loop back you won't be able to test by using the routable IP on a LAN computer.

The best way to test, like the others have stated, would be to simulate a WAN computer or try from an actual remote computer.

Does a port scan show that the ssh port is open?

akrawiec · 01-10-2007, 03:03 PM

OK, this is the problem - My router is Sagem LiveBox. I think it does not support loopback. The connection from real remote computer works good. Thanks ...