If you wish you could use friendly names to access your servers, here’s how to do it:
Edit your ~/.ssh/config and add the following:
Host myserver
HostName 123.123.123.123
Port 12345
User bob
Host other_server
HostName test.something.org
User alice
CheckHostIP no
Cipher blowfish
Please, remember to customize “HostName” and “User” values to your needs. 🙂