How can I restrict incoming SSH connection request to only one interface? I'm using Ubuntu Server 10.04 LST.
I want to lock down access to SSH to only one interface because I use the server as a gateway to my home network. One interface is connected to the DSL modem/router and the other is connected to the home network. I only want to allow access to SSH form inside the home network.
Is restricting SSH to one IP in this case sufficient? Or do I have to lock it down to one interface?