Secure your ports: this step is not necessary, but recommended for security: whitelist your friends' IP addresses (found using whatismyip) in your router settings.This step will ensure that your computer will accept traffic on those ports. Set up your firewall: open (or allow) incoming TCP traffic ports 69 in Windows firewall settings (or whatever firewall you use).This step will ensure that any traffic coming in on those ports will be directed to your computer (by default, those ports are blocked by your router). Set up port forwarding: in your router settings, find Port Forwarding, then forward ports 69 (which can usually be written as 6969,6970) to the static local address you just assigned to your computer.There are a lot of things you could choose, one of the conventions being something in the 192.168.0.0 – 192.168.255.255 range (make sure it is different than your router IP though). Give your computer a static IP: assign your machine (the device with your MAC address) a static local IP address.Open your router settings page: go into your router settings webpage (often accessible at, but not for every router-check the label on your router, or look up the manual for its specific model number).You can find this by opening a command prompt and typing ipconfig /all and looking for the line that says "Physical Address" under your network adapter (e.g. Find your MAC address: find your machine's MAC address, which you will need in order to identify your computer for step 3.In order to use your computer for external traffic, and to allow your friends to connect to a server running on your machine, you need to do a few things: if you went to whatismyip on your phone while on Wi-Fi, you'd see the same IP as when you go there on your computer). This is the IP address that the world sees as 'you' despite that many devices are on the network (e.g. In short, your router has a static (unchanging) external IP address which you can see by going to. Port forwarding allows you to use your local computer as a server for a publicly-facing service.
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