Double NAT Problem with two devices

[Hudra]

1. Find out the IP your Fritzbox assigned to your OpenWrt Device
   a. Go to Heimnetz/Netzwerk/Netzwerkverbindungen – here you’ll find your device under “aktive Verbindungen”. -> This will be your Gateway!!!
   

   

2. Go to Heimnetz/Netzwerkeinstellungen -> under "Statische Routingtabelle" go to -> IPv4-Routen -> Neue IPv4-Route

3. And set it up like this:

Under Gateway fill in the IP from step 1

[anon65312312]

Okay I did this and it worked. I could disable masquerading but still have two private hops in tracert test right?

[Hudra]

@anon65312312

Okay I did this and it worked

That's good!
Disable masquerading on your wan firewall zone and you should be good to go...

[anon65312312]

Hmm I did but still get the tracert result as above

[psherman]

Let’s see a screenshot of the static route you added to your main router, as well as the status page of your openwrt router (specifically the ipv4 upstream section)

[anon65312312]

Here

[psherman]

That looks correct. It should be working - do devices on your openwrt network have normal internet connectivity? The trace route you showed earlier seems right, too.

[anon65312312]

Yes everything works but I thought I still have double nat. All right

[psherman]

No, you do not have double nat anymore since nat masquerading is disabled on your openwrt router. What you have now is a single nat (from your main router) and then symmetric routing between the two routers.

[anon65312312]

Thanks for this explanation. And thanks to Hudra and Pico too