How to fix Minecraft LAN game problems

Minecraft is a fantastic game to play with friends on your local network, but it’s no fun if you have to spend half your time solving connection problems. Let’s take a look at how to identify and fix problems with Minecraft LAN Play.

Identifying the general problem

Thanks to its popularity and the number of parents fighting for their children, we get more emails about Minecraft than any other game. With that in mind, we’ve written this guide with a focus on helping laypeople quickly identify what they need to do to alleviate their specific problem. If your child (or friend) comes to you with any of these questions, you should find the answers here.

However, there’s a good chance you’ve encountered one or more of these problems throughout your Minecraft days. So it certainly wouldn’t hurt to read this article from top to bottom and even bookmark this article for future troubleshooting.

If you’re relatively new to Minecraft, check out our guide to setting up a LAN game here. You may not need advanced troubleshooting help, just a quick overview of how to get things working.

“Cannot see Minecraft game on LAN”

This is by far the biggest problem people face when installing Minecraft on their local area network (LAN): Everyone has Minecraft installed and turned on, but one or more players can’t even see the hosting player connecting.

Let’s break down the most common reasons behind this problem and rank them by frequency with appropriate solutions.

Your firewall is blocking Java

This issue occurs due to confusion about what exactly is going on behind the scenes of Windows Firewall. When Windows asks you for permission to run it, you would expect Minecraft to ask for permission, right? Except that Minecraft is actually a Java file run by the Java program. So when it’s time for Minecraft to connect to the network, the firewall prompt isn’t for “Minecraft” – it’s for Java.

In the image above you can see the specific text of the firewall popup. By default, most people see the security warning, see Java (and don’t know what it is, or know enough about Java to remember what security problem Java has been over the years), and click Cancel. The problem is compounded if you’ve configured your guest computer or the computer your child uses for non-administrative access (which you should do). We can’t tell you how many times we’ve had trouble filming Minecraft just to have the person go, “Oh hey, a firewall box popped up, but I just quit.”

Luckily, the solution to this problem is easy as long as you have admin access to the PC (i.e. the default account is admin or you have the admin account password).

Simply navigate to Control Panel > System and Security > Windows Firewall (or just type “firewall” in the Start menu search box.

In the Firewall control panel, select “Allow an application or feature through Windows Firewall”; The link can be seen in light blue in the image above.

Click the Change Settings icon in the upper-right corner to tell Windows you want to make administrative changes, then scroll down to look for javaw.exe in the firewall entry list. The version of Java your copy of Minecraft is using must have the Private column enabled. While most people only have one entry, it’s possible that you have two entries. (If you have more than one version of javaw.exe listed and want to investigate, you can always right-click each entry and select Details for more information.)

In most cases, this simple tweak is enough to get rid of your connection problems.

Your computers are on different networks

Second, only the java problem is the other – network problem. This problem can take many forms, and once you’ve solved the Java problem (or it wasn’t a problem at all), you should work through these possible scenarios carefully.

Make sure all computers are turned on. same network. With Wi-Fi devices, especially laptops, it’s always possible that the device is connected to an open Wi-Fi network or a neighbor’s Wi-Fi that you’ve been using before. Make sure all computers are on the same local network with the same name (e.g. Player 1 is not set to “Wireless” and Player 3 is set to “Wireless_Guest”).

If one computer is connected to the router via Ethernet, make sure it is connected to the same router as the others via Wi-Fi.

Check for AP isolation

If they’re all connected to the same network but you still can’t connect, it could be due to a feature in your router called AP Isolation. You can use a simple ping test to verify that each player’s computer can reach the computer hosting the game.

First, open the command prompt on each computer and type “ipconfig” for Windows users and “ifconfig” for Linux and Mac users. This command generates a variety of data about the IP address and the status of the computer’s network card. Write down the “IPv4 Address” for each computer. For the vast majority of home users, this address looks like this: 192.168.1. * Or 10.0.0. * As these are the standard address blocks on most routers and are specifically reserved for internal use.

Once you have the addresses on the different computers, use the ping command to see if they can reach each other over the network. Still at the command prompt, type the ping command [endereço IP do computador do host]. So, for example, if you have two computers – one with address 10.0.0.88 and the other with address 10.0.0.87 – enter the first computer (88) and run:

ping 10.0.0.87

Then repeat the process on the second computer (87):

ping 10.0.0.88

The ping command provides an output that tells you the connection speed to the other computer and the number of each user. Packages have been returned successfully. In a home network, the success rate should be 100%.

If both computers can access the internet but fail the ping test, there is one last thing to look out for: user isolation. Some routers have a security feature (which usually only applies to Wi-Fi users and not wired Ethernet users) that isolates users from each other so that anyone can connect to the Internet, but individual users cannot connect to each other. This setting is often referred to as “AP Isolation,” but you may see it as “Access Point Isolation,” “User Isolation,” “Client Isolation,” or a variation thereof. Some routers also automatically apply AP isolation to all guest networks without specifying this setting for the user, so make sure none of the players are connected to your router’s guest network.

If one or more computers fail the ping test and you suspect that access point isolation might be the cause, you will need to consult your specific router’s documentation to see where the setting is and how to disable it . If you find your router’s documentation is missing and you’re forced to dig through the menus, check out our hotspot isolation guide here for some tips on how to find it and enable/disable it.

Try connecting manually

The sections above won’t fix your problem, so the only problem you’re probably having is that for some reason Minecraft isn’t polling the network properly and not updating the list of available LAN games.

This means you cannot play the game on LAN, but you must manually enter the host address to do so. If you see a screen like the one above that keeps searching for LAN games but can’t find them, click the “Direct Connect” button and type: “[Endereço IP do Host Player]: [Host Game Port]“. For example “192.168.1.100:23950”.

The gameport for Minecraft LAN games is randomly assigned every time the host player’s map is opened to play LAN.

Therefore, you need to check the port when you open the game on the host machine (it will appear on the screen immediately after opening the game, as shown below) or you need to look at the game list on another client’s multiplayer screen on your network it can connect successfully (where it lists the IP address and port number under the open game name)

“I can connect but I get kicked out”

If you can see the other game on the local network but get kicked out before you can play, the cause is usually one of three things: different game versions, identical user IDs, or incompatible game mods (in that order of likelihood).

Obsolete server/client error

Out of Sync Minecraft version numbers are the game’s greatest source. Join-but-get-kicked phenomenon and occurs when both the client player and the game running from the host are launched. For example, if the host is running Minecraft 1.7.10, but you’re running 1.8.8, you’ll see a message like this:

The simplest solution is to set the client player’s Minecraft version number to match (we don’t recommend…

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