I've configured port forwarding on my Thomson TWG 870
router to forward ftp, ssh and http connections to my home server. Everything works great when the External IP
address is set to 0.0.0.0. When i change it to my public WAN IP (assigned by my ISP) the forwarding stops working. Why is it like that?
External IP
limits port forwarding to the host identified by that particular IP address? Just guessing. Actually, I suggest you clarify whetherExternal IP
is a setting of the router's port forwarding functionality, whether you read the user's manual and where we can find it, which firmware version it runs, ans which forum posts didn't help you.