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SSH forwarding based on ports

 
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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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LEARN ABOUT SUNOS

ssh-http-proxy-connect

ssh-http-proxy-connect(1)					   User Commands					 ssh-http-proxy-connect(1)

NAME

       ssh-http-proxy-connect - Secure Shell proxy for HTTP

SYNOPSIS

       /usr/lib/ssh/ssh-http-proxy-connect [-h http_proxy_host] [-p http_proxy_port] connect_host connect_port

DESCRIPTION

       A  proxy command for ssh(1) that uses HTTP CONNECT. Typical use is where connections external to a network are only allowed via a proxy web
       server.

OPTIONS

       The following options are supported:

       -h http_proxy_host      Specifies the proxy web server through which to connect. Overrides the HTTPPROXY and http_proxy	environment  vari-
			       ables if they are set.

       -p http_proxy_port      Specifies  the  port  on which the proxy web server runs. If not specified, port 80 is assumed. Overrides the HTTP-
			       PROXYPORT and http_proxy environment variables if they are set.

OPERANDS

       The following operands are supported:

       http_proxy_host	       The host name or IP address (IPv4 or IPv6) of the proxy.

       http_proxy_port	       The numeric port number to connect to on http_proxy_host.

       connect_host	       The name of the remote host to which the proxy web server is to connect you.

       connect_port	       The numeric port number of the proxy web server to connect you to on http_proxy_host.

EXAMPLES

       The recommended way to use a proxy connection command is to configure the ProxyCommand in ssh_config(4) (see  Example  1  and  Example  2).
       Example 3 shows how the proxy command can be specified on the command line when running ssh(1).

       Example 1: Setting the proxy from the environment

       The following example uses ssh-http-proxy-connect in ssh_config(4) when the proxy is set from the environment:

       Host playtime.foo.com
	   ProxyCommand /usr/lib/ssh/ssh-http-proxy-connect 
	       playtime.foo.com 22

       Example 2: Overriding proxy environment variables

       The following example uses ssh-http-proxy-connect in ssh_config(4) to override (or if not set) proxy environment variables:

       Host playtime.foo.com
	   ProxyCommand /usr/lib/ssh/ssh-http-proxy-connect -h webcache 
	       -p 8080 playtime.foo.com 22

       Example 3: Using the command line

       The following example uses ssh-http-proxy-connect from the ssh(1) command line:

       example$ ssh -o'ProxyCommand="/usr/lib/ssh/ssh-http-proxy-connect 
	   -h webcache -p 8080 playtime.foo.com 22"' playtime.foo.com

ENVIRONMENT VARIABLES

       HTTPPROXY	       Takes the http_proxy_host operand to specify the default proxy host. Overrides http_proxy if both are set.

       HTTPPROXYPORT	       Takes the http_proxy_port operand to specify the default proxy port. Ignored if HTTPPROXY is not set.

       http_proxy	       URL format for specifying proxy host and port.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       1	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsshu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ssh(1), ssh-socks5-proxy-connect(1), ssh_config(4), attributes(5)

SunOS 5.10							    24 Oct 2001 					 ssh-http-proxy-connect(1)