Add this to your
.tmux.config for a nice shortcut if you often open ssh sessions from the console.
bind-key S command-prompt -p ssh: "new-window -n %1 'ssh %1'"
Now, you can enter
cntrl-A S and tmux will prompt you for the name of a server. Enter the name of your server, then a new window will be created and an ssh session to that server initiated.
My complete tmux.conf file