![]() If in one of those scenarios it still shows unreachable, then the block could be happening at the ISP level. These are known as bridge-modems (or a modem/router combo in bridge mode). Setups that use modems that directly provide the connected router with a public IP address should always show 'reachable' by default. The IQrouter Advanced Overview page shows the currently opened ports solicited via UPnP at the bottom of the page. ![]() But if an application needs a port to opened and forwarded to the machine it is running on, then it may try and do so via UPnP or ask the user to open it manually. What about security? The IQrouter has a good firewall that by default closes all ports and will not pass unsolicited inbound connections. So whether opened automatically via UPnP or manually in the Advanced menus, port-forwards rely on the WAN of the IQrouter being 'reachable'. For instance many VoIP programs like Skype rely on forwarded ports to improve the quality of the call. Why would you want your router to be reachable? So services and applications that rely on port-forwards can work appropriately. ![]() It is useful when running in a 'cascaded' (one router behind another) to validate that traffic is being forwarded or not. The IQrouter features a handy test to validate whether the WAN port of the IQrouter is reachable to computers on the public Internet.
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