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Top Forums Shell Programming and Scripting SSH forwarding based on ports Post 302811955 by 3therk1ll on Friday 24th of May 2013 03:47:13 PM
Old 05-24-2013
SSH forwarding based on ports

Hi guys, I'm trying to set up an Ubuntu VPN server that will forward an ssh connection automatically as a proxy to two separate LAN hosts.
What I'm looking at doing is making SSH listen on two ports (if that is possible) and get some kind of script, preferably something in bash, that will listen on those two ports and forward the connection to whichever host in the event of a successful connection.

Eg:

P 22 >> Host 1
P 4000 >> Host 2

The two hosts are running red Hat linux and a Windows variant and will be accessed initially from both Linux and Windows machines.
I was looking at getting ssh to listen on the separate ports by editing the
Code:
/etc/ssh/sshd

to add for example, port 4000 underneath port 22 and restart the service.

At the minute I have it all running on Amazon ec2.

Any ideas?
 

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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine (presumably using a login password, so password authentication should be enabled, unless you've done some clever use of multiple identities) It also changes the permissions of the remote user's home, ~/.ssh, and ~/.ssh/authorized_keys to remove group writability (which would oth- erwise prevent you from logging in, if the remote sshd has StrictModes set in its configuration). If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary) SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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