


These are the beginnings of IPv4 addresses, so a complete address would look like, for instance 192.168.0.25, or 10.10.0.217. Do this on both machines, and look for an address that starts with one of the following: Valid IP addresses If you are running Windows, you can get your IP address by running ipconfig, and if you're running OS X or Linux you can use ifconfig ( f instead of p). IP addresses try to have a single IP address for each machine, this means don't connect to the wired and wireless at the same time, it can cause problems There's no one way to fix this that works for every router, so you'll have to research your particular router and how to check/change its configuration. Router rules can sometimes disallow connecting to other computers on the same network by default, as a security feature. If your computer is connected to a network that you have told Windows is "public", there are rules in your Windows Firewall that Java set up that will disallow connections from public networks. Don't just allow the Minecraft.exe either, since it is just an updater. Mods if you are using mods, try it without them to make sure they aren't causing problems, easiest way is to move the folder where your mods are stored somewhere else, including the main jar fileįirewalls make sure that your firewall has an exception for the right version of Java, sometimes you can have a few versions installed, which can cause problems. Versions make sure everyone is running the same version, this includes the server software if you are using it Logins everyone needs to be logged into their own Minecraft account If the server and players are not all connected to the same connection in the same way, cable vs WiFi, that can also be a problem.

Lack of connectivity ensure everyone is connected to the home LAN (WiFi or cable), free WiFi or someone else's open WiFi can cause problems. Also I am assuming a LAN game, since non-LAN games introduce a whole host of other issues to resolve. Note that these suggestions are made to minimize issues, I do not mean to imply you have to meet every condition here for it to work. A few problems that can arise when attempting to connect a game.
