MySQL cannot connect to the intranet database

When there is only an intranet database address , Directly through Navicat add to mysql Cannot link to .
Then what shall I do? ?
If you can know the server address, account and password of the intranet link ,
So it can be Navicat First fill in the contents of the database ：
And then into ssh in , Fill in the address information of the server , adopt ssh First link to the server and enter the intranet , In this way, you can access the intranet database