tunnel

A very useful resource (in French) to use SSH, with specific use cases: Les_tunnels_SSH Another useful (and short one for tunneling): http://www.howtoforge.com/reverse-ssh-tunneling

Connecting to another remote computer through a common central computer

In short, if you have a configuration with 3 computers (A - B - C) and you want to connect to A (arrival) from C (client) but A doesn't allow direct SSH connection, you can do the following:

1. On A and B, install openssh-server
2. On A,

This article was first written in August 2004 for the BeezNest technical
website (http://glasnost.beeznest.org/articles/167).

GRE tunnels between Cisco and Linux (2.4 and up) routers are possible. Given the following two routers, each one gateway for its network:

linux

Public IP: 82.72.101.226 Private network: 192.168.4.0/24 IP on that private network: 192.168.4.4

cisco

Public IP: 123.45.67.8 Private network: 192.168.10.0/24 IP on that private network: 192.168.10.4 See IP

This article was first written in August 2004 for the BeezNest technical
website (http://glasnost.beeznest.org/articles/166).

Setting an IP in IP or GRE tunnel using iproute between two Linux routers is relatively easy. Given the following two routers, each one gateway for its network:

routerA

Public IP: 87.65.43.21 Private network: 192.168.4.0/24 IP on that private network: 192.168.4.4

routerB

Public IP: 123.45.67.8 Private network: 192.168.10.0/24 IP on that private network: 192.168.10.4 To setup routerA, will issue the following commands o