Double NAT - Quick sanity check

Soldato
Joined
12 Sep 2003
Posts
10,767
Location
Newcastle, UK
Hey all

I just wanted to ask the experts that I havent accidently opened myself up here by messing up my NAT settings.

Quick run down of my setup. Zyxel 5G router and Orbi Mesh setup. The Zyxel and Orbi are both in Router mode. I have the Ethernet port on the Zyxel set to "LAN mode" and that connects to the Orbi's WAN port.

All works well.

I have NAT disabled on the Orbi (set to Open mode). On the Zyxel I have NAT enabled on the Cellular WAN internface only. I noted that on the Ethernet WAN entry it had NAT enabled as well. So tonight I disabled it as I'm not using the port as Ethernet WAN, it is set to work as a LAN port.



Am I OK with the below NAT settings?



In my mind the Cellular WAN 1 (which is the one with all the traffic passing through it acording to the traffic logs) is the only one that should have a NAT enabled. That passes through the LAN port to the Orbi. None of those need to have NAT enabled. Am I right? I worry about these things haha in case i've made a mistake!

Thanks for sanity checking this for me. :)
 
I think it is right. If I had messed up I would have no Internet address translation whereas everything seems fine still. Phew. Please ignore my ramblings. Lol.
 
If your PC has 192.168 or 10. starting IP address (use ipconfig from command line) then you're in local network behind NAT.
Unless using manual IP settings DHCP would automatically fetch public IP from ISP (at least after Windows restart) with bridging connection.
 
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