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Top Forums UNIX for Advanced & Expert Users ssh port forward over three server Post 302235917 by strike-2 on Saturday 13th of September 2008 07:57:37 PM
Old 09-13-2008
My guess it you can only ssh to server2 fron server1 due to a rule in the firewall.
You might want to try the forward from server1 to server2 and connecting with tour client to the (forwarded) port on server1.
(the forwarded port on the server may be bound to localhost, there might be an option to avoid this)

If you really can't access the port on server1 fron client, you can use two seperate ssh tunnels:
server1> ssh -L 2222:server2:1111
# Leave this one open
client> ssh -L 1111:server1:2222

This will forward port 1111 on client to port 2222 on server1, which is forwarded to port 1111 on server2.
(different port servers only as illustration)
 

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SSH-ARGV0(1)                                                BSD General Commands Manual                                               SSH-ARGV0(1)

NAME
ssh-argv0 -- replaces the old ssh command-name as hostname handling SYNOPSIS
hostname | user@hostname [-l login_name] [command] hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name] [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command] DESCRIPTION
ssh-argv0 replaces the old ssh command-name as hostname handling. If you link to this script with a hostname then executing the link is equivalent to having executed ssh with that hostname as an argument. All other arguments are passed to ssh and will be processed normally. OPTIONS
See ssh(1). FILES
See ssh(1). AUTHORS
OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen. Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos, Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH. Markus Friedl contributed the support for SSH protocol versions 1.5 and 2.0. Jonathan Amery wrote this ssh-argv0 script and the associated documentation. SEE ALSO
ssh(1) Debian Project September 7, 2001 Debian Project
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