To log into connect to a server using shell access, first you will need an SSH client. Apple OSX terminal has SSH already available, windows users will have to download and install a client such as Putty.
In Apple OSX type into your terminal window and hit enter:
SSH p 5611 username@domainname.com
To log into a server using Putty shell access, enter the domain name or hostname of the SSH server into the "Host name or IP Address" box and change the radio button for the protocol to "SSH", which will automatically change the port number to 22 change the port number to 5611 then click open. You should now be logged into an SSH session on the server.