A question about this router and Three and how it handle IP passthrough. Some pre-amble: (it's a V2 btw)
- I found out eventually that using the Three phone app menu to enable WAN port then removes the IP Passthrough option in the proper Zyxel admin menu.
- I got IP passthrough working fine.
- It seems to passthrough on LAN1 (and poss LAN2) - I use LAN1
What is confusing me is it gets'2 external IPs.
The main external IP is the one that "whats my ip" etc find, and all my external stuff sees - it's the real one, and it works (dynamic, but that's not an issue). I VPN in on that address etc.
What IS odd, is that to access my router for admin, on my LAN, I have to enter the external IP MINUS or PLUS one number. So if it is 92.x.x.230 to the whole world, verified, then the admin Ip to access it will be 92.x.x.229, OR, sometimes, 92.x.x.231
Now I know a bit about networking but this is odd. I assume the address Im using to access the admin menu isn't really an external IP, just something the router is doing?