Telnet: Connection Closed by Foreign Host

Good day:

I know just enough about Linux to get into trouble; appreciate your patience ... ;-)

I've setup a SLES 11.3 server (Xen Hypervisor / SLES 11.3 DomU) as a gateway ahead of 3 network switches. I'm masquerading the switch management ip's.

There are (2) 10G switches whose management interfaces are attached to a 1G Switch. The 1G switch employs in-band management. I've setup the port forwarding:

0/0 8123 0/0 192.168.50.201 23
0/0 8223 0/0 192.168.50.202 23
0/0 8323 0/0 192.168.50.202 23
0/0 8122 0/0 192.168.50.201 22
0/0 8222 0/0 192.168.50.202 22
0/0 8322 0/0 192.168.50.202 22

Remotely I can Telnet or SSH w/ no issues into the 10G switches but attempts to get into the 1G results in no activity and the client window closes OR I'll get a login challenge but the console appears unresponsive and the client window eventually closes.

From the Guest VM I get the login challenge; I can enter credentials; the connection opens; then immediately closes w/ the message "Connection Closed by Foreign Host".

I can ping all the switches via the private network but the 1G shows response times approaching .5 secs ....

From the vantage point of the private network I can Telnet/SSH perfectly fine.

Being a total dunce .. I appreciate any suggestions as to how to debug this ..

THANKS !!!

BTW - I understand this would be more appropriate at forums.Suse.com but I seem unable to post .. the button does not present itself