topic Re: SSH Problem between VLAN's in Operating System - Linux

SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 01:55:06 GMT

I have a strange problem with ssh our here.

We have a particular HP UX 11.11 server called APPLE on a VLAN say 173.20.100.x We have other servers on say 172.20.200.x

I am able to ssh from servers on 172.20.100.x to APPLE (on the same VLAN). But i cannot ssh to APPLE from other VLAN's.

ANy idea what the problem could be. The network guys say they are not restricing access. Also i can telnet fine from other VLAN's to APPLE.

Thanks in advance.

Pat

Re: SSH Problem between VLAN's

Alexander Chuzhoy — Mon, 31 May 2004 02:56:15 GMT

You 'd probably get a better answer in HPUX forum.
Since you can telnet from other Vlans to APPLE-it doesn't sound like route problem.

It could be a result from firewall or service restriction.
I'd search for restriction entries in sshd config file or firewall config file.

Re: SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 04:17:32 GMT

Hi,

I thought i was on the HP UX forum.

Am attaching a debug file. first part is the debug run on the client.

second is on the server.

thanks

Pat

Re: SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 04:23:11 GMT

Sorry the server name is gentst1. i just called it ORANGE.

Need help. Please give me some clues. Can't figure this out. ssh FROM this server APPLE to another on another VLAN works fine. so i think the issue is with sshd (server) not ssh (client).

any clues on where to look will be priceless. Point will be assigned.

rgds

Pat

Re: SSH Problem between VLAN's

Olivier Drouin — Mon, 31 May 2004 08:42:17 GMT

post the output of

telnet yourserver 22

Re: SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 08:51:54 GMT

I did
telnet gentst1 22
output
--------
trying..
connected to gentst1.
escape character is '^]'.
SSH-2.0-OpenSSH_3.5pl

protocol mismatch
connection closed by foreign host
---------------------

rgds

Pat

Re: SSH Problem between VLAN's

Alexander Chuzhoy — Mon, 31 May 2004 09:23:56 GMT

what error does the client get when he tries to connect to the server?

Re: SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 11:34:34 GMT

hi

the client does not get any error. just does not connect. the ouput is in the file i have attached earlier.

rgds

pat

Re: SSH Problem between VLAN's

Steven E. Protter — Mon, 31 May 2004 13:12:17 GMT

Try the ssh with the -v option.

This is probably network address or subnetting problem, possibly in the route configuration.

You will have to trace it hop to hop until you find it. Elementary, Mr. Watson.

SEP

Re: SSH Problem between VLAN's

patrick coutinho — Mon, 31 May 2004 14:42:28 GMT

Hi everyone,

i have moved this issue into the right place at the HP UX forum.

Maybe that will help me a bit more.

Thanks to everyone.

rgds

pat

Re: SSH Problem between VLAN's

peter demus — Tue, 01 Jun 2004 03:47:52 GMT

Hello !

have You enabled the right protocol version 1 or 2 / 1 and 2 / 2 only on both SSH server clients ??

is ping working ??

bye peter

Re: SSH Problem between VLAN's

patrick coutinho — Tue, 01 Jun 2004 04:02:35 GMT

Hi Peter,

Thanks. The problem is solved. was an issue with the switch settings.

rgds

Pat