Hello, I have a linux box that is a router/gateway running iptables rule sets. I have setup a dynamic dns account at www.no-ip.org
. This runs a client on my laptop that updates my record at no-ip.org with my current ip address (ie. fred.myvnc.com = xxx.xxx.xxx.xxx).
What I would like to do of course, is have my iptables firewall update with my ip address from my resolved no-ip dns, and allow my laptop to connect to ssh and remote desktop from where ever I am. And have it update, every 5min? or so. (Usually at my home or another office (but my concern is that my home ip might change and cause me a problem in the future (or if I am out of town))). I realize that I would not want to do this from a cyber cafe, but I do not want to have the port open to the world full time either, and that IP would change as soon as I get to the office.
I looked a something called port-knocker, http://www.ducea.com/2006/07/05/how-to-safely-connect-from-anywhere-to-your-closed-linux-firewall/
that looked interesting, but I would rather have it more 'automatic' that I do not need to really do anything special to initiate this (aside from the no-ip.com stuff (which I already use for my home stuff))