Don't be fooled into thinking that static routing is always the best tool for the job, however. The greatest negative to using static routes is that they don't scale as your network grows. This is ...

When you have two "NAT routers". Whether double NAT or not. wall--RJ11--router-modem(RM)---LAN-WAN--router(R)----LAN--comps (A Router-Modem(RM) so no WAN port, And a router R which has a WAN port, and ...