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Common LAN Connection Issues Fixes!

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avatar Safixk
Level 35 : Artisan Engineer
4
A few problems that can arise when attempting to connect a game. 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. Also I am assuming a LAN game, since non-LAN games introduce a whole host of other issues to resolve.

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.

Logins - everyone needs to be logged into their own Minecraft account - You just simply cannot play if you both use the same account, NO EXCEPTIONS

Versions - make sure everyone is running the latest version, this includes the server software if you are using it

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 file

Firewalls - 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. Don't just allow the Minecraft.exe either, since it is just an updater. 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. Try disabling those rules.

IP Errors - 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

Valid IP addresses - If you are running Windows, run ipconfig on both machines, and make sure you see 192.168 as the start of the IPv4 address. Also make sure the third digit (usually 0) matches. Google subnet masks if you want to learn how they work. To run ipconfig, you must open the command prompt (cmd) and type in ipconfig, then press enter.

Try Direct Connect various problems can prevent automatic finding from working, try typing the address printed when the world was enabled into the Direct Connect link.

Try Downloading The Server Standalone You don't need to port-forward to play in LAN, so if Open to LAN doesn't work, download the minecraft_server.exe(or .jar) and try to run it that way! (Note: You will need to use Direct Connect for this method, and you'll be using the other machine's internal IP address)

Hopefully this fixes your problem!

~Safixk
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  • Sivaas_
  • Level 1
  • New Explorer
  • May 22, 2018, 9:07 am
There is a fix not mentioned here, but there is HERE. It's the "allocate more RAM". (However, I do not know how to apply it with the new launcher. Any help would be appreciated.): http://hopper.minecraft.net/help/out-of-memory/
  • Sivaas_
  • Level 1
  • New Explorer
  • May 22, 2018, 9:14 am
I tried everthing but nothing worked and when my friend typed in the ip4 code and the bit after the colon it just loads forever. do you know anymore ways becuase it isn't my firewall.

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