Configuring port forwarding on AT&T router models using "Passthrough" settings
Configuring port forwarding on AT&T router models using "Passthrough" settings
192 is usually set aside for private IP addresses. That means the assumption is the AT&T device is operating in bridge mode. If your WAN IP is 192, it could indicate you're using a carrier-grade NAT. This was a Reddit post from 2012. AT&T is implementing carrier-grade NAT on parts of their network.
Your IP pool change on your NetGear might help resolve the problem. It’s not guaranteed, but it’s worth trying.
Carrier grade NAT indicates ATT ran out of IPv4 addresses. Much like your router relies on private IPs, they began employing them across their network. Private IPs aren’t accessible over the internet. In short, ATT is essentially sharing a single public IP with numerous subscribers, just as your router shares a public IP with many devices on your local network. Generally, AT&T would need to perform port forwarding on their end to make this work. Assuming you're correct about carrier grade NAT, though the Reddit comment suggests they were using 10.x.x.x addressing and you believe your ATT gateway is assigning a 192.x.x.x address, it implies they aren’t operating in bridged mode and not broadcasting a public IP. Have you reached out to AT&T to check if they can adjust this configuration? You only ask because certain settings require the ISP to modify them for you.
I talked to AT&T two days back regarding this problem. They think it’s a faulty unit. Since someone is scheduled for Saturday, they should assist or help. However, I just learned I needed to log into my AT&T account on their site and turn on Port Forwarding—which feels strange for me. I did that, reset the router, and again the same issue occurred.