Hi all, It's my first post here. I'm on a networking problem for a while and would really appreciate some help... Here's the situation. I want to access with SSH from everywhere to a cluster that I built. The frontend computer is connected to a router (Trendnet TEW-633GR) which is configured to forward port 22 as described in the page: http://portforward.com/english/rout... It has also a routable static IP, let's say 1.2.3.4. On the frontend, sshd is up and running. The router has a wireless network configured. I can connect to its wireless network and access the frontend with SSH with the static IP 1.2.3.4. However, I can't do the same when I'm not on the wireless network and using the network at my office, i.e.: Code: me@office# ssh -vvv me@1.2.3.4 OpenSSH_5.1p1 Debian-5ubuntu1, OpenSSL 0.9.8g 19 Oct 2007 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 1.2.3.4 [1.2.3.4] port 22. debug1: connect to address 1.2.3.4 port 22: Connection timed out ssh: connect to host 1.2.3.4 port 22: Connection timed out Now, the strange thing is that I can connect from my home with ssh: Code: me@home# ssh me@1.2.3.4 me@1.2.3.4's password: It works! (I did not put the -vvv option here obviously to encourage you reading further...) I haven't put any filter on the router (mac or IP) and I can ping it. Note that the ip of the frontend toward the router is 192.168.10.196, with subnet 255.255.255.0, and the external address 1.2.3.4 has the same subnet. What could it be? Thanks