Fix Minecraft Connection Timeout

By Zennith Tech Lab • Published 2026-05-22 •
MinecraftJavaNetworkingGaming

To fix Minecraft io.netty.channel errors, flush your system DNS caches and allocate more RAM to the game client wrapper.

Quick Minecraft Network Fix

Flush your operating system DNS cache and allow Java executables through the Windows Defender Firewall to solve Minecraft runtime timeouts.

# Step 1: Flush DNS on Windows Console

Windows network address stacks get tangled, blocking Java processes from communicating with Minecraft servers: 1. Press Windows Key, search for cmd, right-click, and select Run as administrator. 2. Paste the following command and hit Enter:

``bash # Rebuild local interface resolver caches ipconfig /flushdns ``

# Step 2: Allow Java Through Windows Firewall

1. Open the Start menu, search for Allow an app through Windows Firewall, and click it. 2. Select Change settings. 3. Under Allowed apps and features, locate both Java(TM) Platform SE binary and javaw.exe. 4. Check both the Private and Public checkboxes on all Java lines, click OK, and startup your Minecraft client wrapper again.