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Top Forums UNIX for Advanced & Expert Users Help on port forwarding please.. Post 302969063 by magnus29 on Thursday 17th of March 2016 01:00:09 PM
Old 03-17-2016
Help on port forwarding please..

Hi experts,

We have windows machine ( A ) in one network & 2 Linux Servers ( B & C ) in another network. There is a firewall between these 2 networks and SSH (TCP/22) & HTTPS (TCP/443) are allowed from A to B only (but not to C). There is no personal firewall / iptables running on any machine. There is no access restrictions between B & C. We need to access port 443 of C from A. Is it possible? I tried various documents suggesting port forwarding technique using putty but none of them worked unfortunately (they are bit confusing too)

1. How to access 443 port of C from A?
2. if A is "Linux machine" (instead of Windows) how to achieve the same? ( i guess ssh -L command should be used but it did not work)

ensured AllowAgentForwarding yes & AllowTcpForwarding yes are set on all linux machines.


Please advise, thanks a lot!!

Last edited by magnus29; 03-17-2016 at 02:08 PM..
 

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corkscrew(1)							    Networking							      corkscrew(1)

NAME
corkscrew - Tunnel TCP connections through HTTP proxies SYNOPSIS
corkscrew PROXY PROXYPORT TARGETHOST TARGETPORT [AUTH_FILE] DESCRIPTION
corkscrew is a simple tool to tunnel TCP connections through an HTTP proxy supporting the CONNECT method. It reads stdin and writes to std- out during the connection, just like netcat. It can be used for instance to connect to an SSH server running on a remote 443 port through a strict HTTPS proxy. PROXY The name of the host running the HTTP proxy. PROXYPORT The port on which to connect on the proxy. TARGET The host to reach through the proxy. TARGETPORT The port to connect to on the target host. AUTH_ FILE The auth file is made of one single line containing your username and password in the form username:password OPTIONS
None. EXAMPLES
The common usage of corkscrew is to put the following line in ~/.ssh/ssh_config: ProxyCommand corkscrew proxy proxyport %h %p [<path to auth_file>] This will let the ssh connection go through the proxy with the help of corkscrew. ENVIRONMENT
None. FILES
None. SEE ALSO
ssh_config(5) AUTHORS
Program was written by Pat Padgett <agroman@agroman.net>. This manual page was written by Laurent Fousse <laurent@komite.net> for the Debian GNU system (but may be used by others). Updated by Jari Aalto <jari.aalto@cante.net>. Released under license GNU GPL version 2 or (at your option) any later version. For more information about license, visit <http://www.gnu.org/copyleft/gpl.html>. corkscrew 2012-03-26 corkscrew(1)
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