If you tried to join a Minecraft server or a LAN world and got hit with “Internal Exception: java.net.ConnectException: Connection timed out: getsockopt”, you are dealing with one of the most common Minecraft network errors. It looks scary because of the technical wording, but it almost always comes down to a firewall, a wrong IP or port, or a DNS problem on your side, not a broken server. This guide walks through what causes it and gives you a clear order of fixes to try.
Quick fix
Open Windows Defender Firewall, click “Allow an app or feature through Windows Defender Firewall,” then “Change Settings.” Find Minecraft, Minecraft Launcher, and javaw.exe, and tick both the Private and Public boxes for each. Click OK and restart Minecraft. This single step resolves the getsockopt error for most players. If it does not, work through the full steps below in order.
What the getsockopt error means in Minecraft
Getsockopt is a network function that Minecraft’s Java client uses to check the status of a socket connection while it tries to reach a server. When the error appears, it means the game attempted to open a connection but never got a response before the connection timed out. That can happen for several unrelated reasons, which is why the fix is not always the same for every player.
The error is not a Minecraft bug in the traditional sense. It is a network layer failure, so the troubleshooting has to happen at the level of your firewall, router, DNS, and Java installation rather than in the game itself.
Common causes of the getsockopt error
- Windows Defender Firewall or third party antivirus is blocking javaw.exe, the process Minecraft uses to handle network traffic.
- You entered the wrong IP address, port, or subdomain, or the server recently moved to a new address.
- Your DNS resolver is slow, misconfigured, or failing to look up the server address.
- Your system clock is set incorrectly, which can cause certificate and authentication checks to fail during the connection handshake.
- You are on a school, work, or public network where the administrator has blocked the game’s port.
- Mojang’s authentication servers are temporarily down for maintenance.
How to fix the getsockopt error in Minecraft
Step 1: Confirm the server address and restart your launcher
Double check the IP address, port, and subdomain you are using to connect. A single wrong digit will produce this exact error. Open Minecraft, go to Multiplayer, choose Direct Connection, and re-enter the address carefully rather than relying on a saved server entry that may be outdated.
After confirming the address, fully close the launcher, not just the game window, then reopen it and try connecting again. This clears a stuck network session and resolves the issue for many players on the first try.
Step 2: Allow Minecraft through Windows Defender Firewall
Open the Start menu and search for Windows Defender Firewall. Click Allow an app or feature through Windows Defender Firewall, then click Change Settings, which requires administrator rights. Scroll down and find every entry for Minecraft, Minecraft Launcher, and OpenJDK Platform binary or javaw.exe. Make sure both the Private and Public checkboxes are ticked for each entry, then click OK and restart Minecraft.
If you run a separate antivirus program alongside Windows Firewall, check its network protection settings too, since it can override the Windows rules you just set.
Step 3: Flush your DNS cache and switch to a public DNS
Open Command Prompt as administrator and run ipconfig /flushdns, then try joining the server again. If the error persists, switch your network adapter to a public DNS service. Go to Control Panel, then Network and Internet, then Network and Sharing Center, then Change Adapter Settings. Right click your active connection, choose Properties, select Internet Protocol Version 4 (TCP/IPv4), and click Properties. Choose “Use the following DNS server addresses” and set the preferred server to 8.8.8.8 and the alternate to 8.8.4.4, then restart your computer.
Step 4: Check your system clock
Right click the clock in your taskbar and select Adjust date and time. Make sure both Set time zone automatically and Set time automatically are turned on, then click Sync now under additional settings. An incorrect system clock can cause Minecraft’s authentication handshake to fail even when your network connection is otherwise fine.
Step 5: Update Java and try a different network
Minecraft Java Edition needs a current Java runtime to keep a stable connection. If you have not updated Java in a while, install the latest version and remove old duplicate installs that can confuse the firewall rules you set earlier. If you are on a school, office, or public Wi-Fi network, try switching to mobile data or a different Wi-Fi network, since administrators on shared networks often block the ports Minecraft needs.
If none of the steps above help, it is worth checking whether Mojang’s authentication servers are experiencing an outage before assuming the problem is on your end.
Still stuck?
If you have worked through every fix above and the getsockopt error still shows up, the problem may sit with the hosting provider for the server you are trying to join, in which case contacting their support team with your IP, port, and error message is the fastest way forward. For LAN games, ask the host to confirm they clicked Open to LAN and share their correct local IP address rather than a public one.
TLDR
- The getsockopt error means Minecraft tried to connect to a server and got no response before timing out. It is a network problem, not a game bug.
- Fastest fix: allow Minecraft, Minecraft Launcher, and javaw.exe through Windows Defender Firewall for both Private and Public networks.
- Still stuck? Recheck the IP, port, and subdomain, restart your launcher, flush your DNS cache or switch to 8.8.8.8, fix your system clock, and update Java.
- If nothing works, the server node or Mojang authentication servers may be down. Confirm status before contacting support.
About the Author
Anup V Naik is the founder of Wings Infotech and writes on financial, regulatory, and public interest topics. He holds a Mechanical Engineering degree from Manipal Institute of Technology and an MBA from TKM Institute of Management. He covers gaming platforms, account and sign-in troubleshooting, and consumer technology, cross-checking every step against official Microsoft and Minecraft support documentation before publishing.
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