Connect with ssh from 1 server to another

This is quite easy but as I don't use it every day-more likely once a year..

After connecting to the first server with ex. Putty we need to know some stuff about server2

User that have access to ssh
Witch IP the server have
Witch port ssh is bound to on server 2

We say User= user, Ip=, port=225

When we do it as this

ssh user@ -p 225