If you are running a unix-like machine, like a Linux workstation, or BSD or Apple Mac, you might be acquainted with the ~/.ssh directory. SSH stores known hosts in their, as well as your public and private SSH keys and more important stuff.
The contents of a ~/.ssh/config look something like:
Host homeserv HostName home.mydomain.net Port 22 User michiel # Routers, so I config them from on the road LocalForward localhost:8001 192.168.1.1:80 LocalForward localhost:8002 192.168.1.2:80 LocalForward localhost: # SickBeard LocalForward localhost:8081 localhost:8081 Host dev HostName dev.corp.net Port 22 User mscholten
Of course you can add as many 'Host' configs as you like.
You can now use these configs from your terminal:
ssh dev instead of
ssh email@example.com (or those long lines with port forwards you tended to create an alias for in ~/.bash_aliases).
Bonus: if you are running gnome-shell on your machine, you can install the SSH search provider extension, so you can directly launch a terminal with all settings in place from the overview page. Productivity boon in my not-so-humble opinion ;)
For more information, see Advanced SSH configuration and tunneling: We don't need no stinking VPN software.
Also, if you want do some VPN-like stuff, you really need to check out Never again be thwarted by restrictive "guest" wifi (e.g. on buses or airplanes). The sshuttle proxy they use is really nifty.