special socks 5 proxy server for linux ? is it available e?

[chennaiprogrammer]

I need to have the following setup

is this possible ?

There are about 15 computers in LAN

ONE computer will act as the gateway to the internet

ALL other 14 computers will access the internet via THAT gateway computer

all 14 computers will run windows XP

The gateway computer will run LINUX

ALL 14 client computers will use

http://winscp.sourceforge.net/eng/index.php

or any sftp , ftp and ssh client

The gateway computer needs a sftp, ssh and ftp proxy server software

and THAT proxy needs to be a special proxy with the following capability

say computer1 in LAN wants to access an external server via SFTP and ithe external server's details are

1 IP address
2.Actualusername
3.Actualpassword

I need to configure the special proxy with the above actual values

AND anyone from one of the windows client computers will fire up their SCP/sftp client software and connect to the proxy using a unique username and password in LAN

like

Proxy computer IP
unique username
unique pass

NOW the proxy running on the gateway when it encounters this unique username and unique pass, IT must immediately know to "tunnel" or pass the connection to the

1 IP address
2.Actualusername
3.Actualpassword


actual server..

The objective of the whole exercise is to prevent users in THOSE 14 computers from even knowing which server they are accessing and also to shield from them the important usernames and passwords

so a mapping file may need to exist in the proxy

internal username:internal password --> external ip:external username:
external password
internal username1:internal password1 --> external ip1:external
username1: external password1
internal username2:internal password2 --> external ip:external
username2: external password2

so for example any LAN machine which connects to the proxy using a
sftp client using say internal username1: internal password1 should be
seamlessly connected to the external ip1 server via sftp

In other words a user in a client machine in the LAN launches his sftp
client and connects to say 192.168.0.99 (the socks5 proxy server
machine) and types in internal username1 internal password1. Now the
squid proxy must refer the mapping file and in turn connect via sftp
to an external server of ip external ip1 , external username1 and
external password 1


Is the above arrangement possible ? if so please point me to THE PROXY softwaRE which does this ?

Please also ask me if you need more clarification

chris

 

[ericbrunson]

I don't think you can proxy ssh traffic like that. It's essentially a man in the middle, which they go to great lengths to avoid the possibility of. I could be wrong, though.

 

[chennaiprogrammer]

Ok how about ftp traffic atleast if not ssh ?