Log into your router. Under "WAN setup" or similar you should see "NAT filtering" or similar. Check the box next to "open". Be advised that opening NAT exposes your network to the Internet. Better to find out which specific port is needed for your application and stipulate that under "port triggering" or port forwarding.
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Log into your router. Under "WAN setup" or similar you should see "NAT filtering" or similar. Check the box next to "open". Be advised that opening NAT exposes your network to the Internet. Better to find out which specific port is needed for your application and stipulate that under "port triggering" or port forwarding.