Telnet: Connection Closed by Foreign Host

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#1

Good day:

I know just enough about Linux to get into trouble; appreciate your patience … :wink:

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

#2

On 2014-05-10 01:06, DBrenchley wrote:
>
> Good day:
>
> I know just enough about Linux to get into trouble; appreciate your
> patience … :wink:
>
> I’ve setup a SLES 11.3 server (Xen Hypervisor / SLES 11.3 DomU) as a

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

But openSUSE users can not help you, unless they also happen to be SUSE
users. And then, they will be subscribed there already.

–
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 “Bottle” (Minas Tirith))

#3

Thank You Carlos … I’m sure the talent here is more than able to offer their opinion …

#4

On Fri 09 May 2014 11:06:01 PM CDT, DBrenchley wrote:

Good day:

I know just enough about Linux to get into trouble; appreciate your
patience … :wink:

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

Hi
Can you try posting in the SUSE forum again, else will have to see if
the forums admin can sort your account out.

–
Cheers Malcolm °¿° SUSE Knowledge Partner (Linux Counter #276890)
openSUSE 13.1 (Bottle) (x86_64) GNOME 3.10.1 Kernel 3.11.10-7-desktop
If you find this post helpful and are logged into the web interface,
please show your appreciation and click on the star below… Thanks!

#5

No Joy Malcolm … I can’t even send them an email …

#6

On 2014-05-10 15:46, DBrenchley wrote:
>
> malcolmlewis;2642242 Wrote:
>> Hi
>> Can you try posting in the SUSE forum again, else will have to see if
>> the forums admin can sort your account out.
>
> No Joy Malcolm … I can’t even send them an email …

Try posting in this forum support area, or ask a moderator to move this
thread there. Probably they can contact the other forum support people.

–
Cheers / Saludos,

Carlos E. R.

(from 13.1 x86_64 “Bottle” (Minas Tirith))