Have you ever wanted to ssh to your Linux box that sits behind NAT? Now you can with reverse SSH tunneling. This document will show you step by step how to set up reverse SSH tunneling. The reverse SSH tunneling should work fine with Unix like systems.

Let’s assume that Destination’s IP is 192.168.20.55 (Linux box that you want to access).

You want to access from Linux client with IP 138.47.99.99.

Destination (192.168.20.55) <- |NAT| <- Source (138.47.99.99)
1. SSH from the destination to the source (with public ip) using command below:

ssh -R 19999:localhost:22 [email protected]

* port 19999 can be any unused port.

2. Now you can SSH from source to destination through SSH tuneling:

ssh localhost -p 19999

3. 3rd party servers can also access 192.168.20.55 through Destination (138.47.99.99).
Destination (192.168.20.55) <- |NAT| <- Source (138.47.99.99) <- Bob’s server

3.1 From Bob’s server:

3.2 After the sucessful login to Source:

ssh localhost -p 19999

* the connection between destination and source must be alive at all time.

Tip: you may run a command (e.g. watch, top) on Destination to keep the connection active.

Explore More

XSS Stealing Cookies

This method (XSS attacks) is for get the cookies users, so, for get information of users… and then, login into the account of the victim user…u will have to give

Read More

Hacking Your Computer – Physical Access is Total Access

Hacking Your Computer – Physical Access is Total Access Table of Contents -Disclaimer -Introduction Part 1: Gaining Access -LiveCDs -Windows Option 1: Cracking the Password -Windows Option 2: Circumventing the

Read More

What are snort rules?

Snort rules are the conditions specified by a Network Administrator that differentiate between normal Internet activities and malicious activities. Snort rules are made up of two basic parts: * Rule

Read More