Src Address: Not frequently used, this will restrict the rule to incoming requests from the specified addresses. TCP is used for most Internet traffic, but UDP is often used for streaming media. Proto: Whether to forward for TCP, UDP, or both protocols. On: Checkbox enables or disable port forwarding rule. When configuring a port forward, there are several criteria you may specify:

In the picture above, the configuration labeled “primary Web server” demonstrates forwarding port 80 to an internal computer, with the address 192.168.1.10. To configure basic forwarding in Tomato, log in to the router’s administrative interface (default ) and click on Port Forwarding/Basic. You need the router to forward these requests to the internal IP address of your server. In the case of running a Web server, incoming requests will hit the router asking for port 80. And in most of these cases, that means you’re running a server inside your LAN, such as a Web server. Most of the cases where you need to use port forwarding involve directing incoming requests from the Internet to a particular machine inside your LAN. If few of those words make sense now, hopefully they will soon. This is called port forwarding, and Tomato offers four basic kinds of port forwarding configuration: basic, DMZ (de-militarized zone), triggered, and UPnP/NAT-PMP. If your router is running Tomato firmware, you can configure how it manages particular kinds of data so that it travels the correct route. This ensures that data coming into your network from an outside machine reaches the correct destination, and that outgoing data enjoys the same. One job of a router is to navigate data from external to internal ports and vice versa. In custom configurations you can sometimes use non-standard ports, but most applications stick to the standard port assignments. Meanwhile, port 21 is used for FTP and port 110 for POP3 e-mail. Many network applications are assigned to specific ports-besides port 80, port 443 is used for HTTPS, or secure Web communications. For example, if your computer contacts the Web server of a remote computer, it usually knocks at the door of port 80, because this is where most Web servers “live.” When two computers connected via the Internet want to talk to one another, they do so through a channel called a “port.” If each computer were an apartment building, a port would be a particular apartment. How to: Monitor Bandwidth with Tomato Firmware.How to: Manage Traffic Using Tomato and QoS.

If your router is running Tomato firmware, you can configure how it manages particular kinds of data.

Universal media server port forwarding