Port Forwarding Settings
Port Forwarding: Port forwarding allows specific ports of the hosts residing in the internal network to be forwarded to the external network. This is useful for number of applications such as FTP servers, gaming, etc. where different host systems need to be seen using a single common IP address/port. Port Forwarding rules can be set in Port Forwarding window, which is opened by enabling the Port Forwarding option and activating the Configure button.
Port Forwarding entries can be specified by using the following criteria:
Private IP is the IP of the host which is connected to the internal network and needs to be accessible from the external network;
Private Port is the TCP/UDP port of the application running on the host which is connected to the internal network. The specified port will be accessible from the external network;
Type is the L3 protocol (IP) type which needs to be forwarded from the internal network. Public Port is the TCP/UDP port of the based device which will accept and forward the connections from the external network to the host connected to the internal network.
Comments is the informal field for the comment of the particular port forwarding entry.
Few words about the particular port forwarding entry purpose are saved there usually. Enabled flag enables or disables the effect of the particular port forwarding entry. All the added firewall entries are saved in system configuration file, however only the enabled port forwarding entries will be active during the system operation.
New entries in port forwarding can be saved by activating Save button or discarded by activating Cancel button in the Port Forwarding configuration window.
DNS Proxy: The DNS Proxy forwards the Domain Name System requests from the hosts which reside in the internal network to the DNS server while device is in operating in Router mode. Valid Primary DNS Server IP needs to be specified for DNS Proxy functionality. Internal network interface IP of the device should be specified as the DNS server in the host configuration in order DNS Proxy should be able to get the DNS requests and translate domain names to IP addresses afterwards.