Configuring static ip on firewall

[BunnyHug]

Backstory:​

I recently requested for a static IP and as usual, Airtel being Airtel, closed request, reopened it, no call from anyone. One fine day, internet stopped working and the ONT (Nokia G2425) had a new Wan entry for static ip and the pppoe has been marked as "migrated" or something. rebooted the router and now I have internet access back on the router. This is almost a month ago and yesterday, I received a mail saying I denied the static IP request but I still have the ip assigned to me and internet still works. Also no charges for static IP on last month bill (the ip was assigned before 2 weeks of bill generation). Have I got myself a free static IP?

The question:​

So I have also enabled bridge mode and I have a sophos Home edition FW running connected to the ONT in bridge mode and its connected using PPPoE. Currently, I have the ONT router's wifi using static IP and the AP connected to Sophos has dynamic IP from PPPoE. How do I disable static IP on ONT and assign it to Sophos? I guess I cannot have same IP assigned to both ONT and Sophos and expect it to work?

 

[Lolita_Magnum]

So... the thing is. If you have the locked version of Nokia G2425-A, there is no way to remove the WAN config manually on your own.

But here is something, you can do that might work:

• Unplug the fiber cable from the router.
• Reset the router.
• Login to the router.
• Confirm under Network > WAN, that it is running on default WAN config.
• Go to Security > Firewall > Security Level Off, Attack Protection No.
• Then, Security > Access Control > On the WAN end, select the correct profile and change every value to Deny (especially TR.069)
• Do the above for all profiles. (If there is more than one.)
• Go to LAN and select the port that was initially in bridge mode and change accordingly. (This will be under the Port mode section)
• Your router will reboot now. Once, just confirm that everything is set as above and then plug back in the fiber.
• Connect your firewall. Set up your static IP under your WAN configs.
• And, this should be good.