Yes, AT&T allows port forwarding. You can set up port forwarding on your AT&T router by logging into your router and accessing the port forwarding section. From there, you can enter the port numbers and the IP address of your device. Choose a forwarding protocol and save your changes. If you don't see a port forwarding option in your router's settings, you may need to upgrade your router. Port forwarding allows you to route incoming and outgoing data on your home network from a remote location. It helps in directing the data to the proper destination by using the IP address and ports of each connected device on the network.