I have optlink modem from bsnl and have connected D-Linkrouter to it using lan and router configured itself automatically. Didn't do any setting for bridging.
I haven't changed any settings in bsnl modem.
Here is screenshot of Port forwarding settings Port Forward
Since not configured in the bridge, it's very likely that BSNL is the one dialling PPPoE and getting WAN IP. So before you setup port forwarding on your D-Linkrouter, you first need to setup port forwarding from BSNL Optilink device to D Link router.
Either setup port forwarding or just put D-Link device private LAN IP as "DMZ IP" in BSNL device and maintain firewall at the D-Link only.
Yes very likely because unless you have changed default setup:
Optilink will dial PPPoE and will get 1 Public WAN IP and next would have DHCP+NAT preconfigured. When you connect D-Link to it and defined WAN IP for D-Link as "DHCP" then D-Link will learn a private IP via DHCP of Optilink.
Config wise it seems fine on D-Link. I haven't checked what specific ports you need for PS4 but as long as you have checked I can confirm setup wise it is fine.
Yes, screenshot showing DMZ settings to be sure.
Plus last time when I used, BSNL used to give public IP. Do cross check it to be sure that your WAN IP is public and not a private IP.
@Anurag Bhatia@abhi9822& Perhaps it makes sense to remove the double NAT? Either set the ONT in bridge mode and let your D-Link do NAT or let it be as is now, and use the D-Link as a dumb AP? ie just connect the cable from your ONT to one of the LAN ports on the D-Link device, and disable the DHCP server on the D-Link. You'd then need to manage port-forward and other things on the ONT device.
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