Try disabling UPnP in your UniFi Network Application’s Internet Settings.

Note: It is possible to forward multiple WAN ports to the same LAN port.Īnother possible cause is that UPnP is enabled and is already using the port. For example, TCP port 443 can only be forwarded to one LAN port. Your UniFi Gateway is already forwarding the port to another device or has UPnP enabled.Ī given WAN port can only be forwarded to a single device within your network. You may wish to contact your ISP to assist with port forwarding or providing a DMZ option that allows you to automatically forward the ports. If that is not supported, you will need to first forward the port(s) on the upstream router/modem to the WAN address of your UniFi Gateway in addition to forwarding them from your UniFi Gateway to the desired location.

To fix this issue, try to re-configure your ISP modem/router into bridge mode so that your UniFi Gateway can obtain a public IP address on the WAN interface. You are likely affected by this if your UniFi Gateway has a WAN IP address in one of the following ranges: This happens if your UniFi Gateway is located behind another router/modem that uses NAT.

Your UniFi Gateway does not have a public IP address (Double NAT). Refer to the troubleshooting steps below if your Port Forwarding or custom Destination NAT rule is not working. Create Port Forwarding rules within UniFi Network in the Settings > Firewall & Security section.

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