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SSH Tunnels: Bypass (Almost) Any Firewall |
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Source: Polish Linux - Posted by Eric Lubow
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The goal of this article is to present a few effective methods to revamp the way you work in a restricted corporation-like network. In order to achieve it we’re going to use SSH tunneling to bypass the firewall rules applied by your system administrator. We’ll start with breaking through simple restrictions and gradually pass to more and more elaborate firewalls while we move on. This article is a continuation of a previous text: SSH tricks published in our vortal last month. The spirit of this article is a little bit different, though. It targets more experienced users, especially those who have to work in computer networks with harsh security rules. To make it clear - using SSH to tunnel insecure protocols like FTP or CVS is not in the scope. Perhaps another SSH article will cover this.
For simplicity reasons, throughout this text we’re going to use some default names. The workstation which is located in a restricted network eg. on our desk at work (the one we are going to revamp) will be called LOCAL_HOST. The second one should be outside the restricted network eg. at our house and will be called REMOTE_HOST. Let’s assume that on the home workstation there is a user named user and on the work machine there is a user worker. On the REMOTE_HOST with a public, static IP an SSH server is installed. Although all the solutions presented in this article can be applied in any GNU/Linux distribution or even in MS Windows to make it simpler, we will consider a Debian-like system only.
Read this full article at Polish Linux
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