Minecraft Server Guides
Short, focused guides for the parts of running a server that trip people up. Each one stands alone and links back to the relevant step of the full setup tutorial.
12 minutesUpdated September 2026Beginner
Minecraft Server Port Forwarding: Open Port 25565 on Any Router
Open port 25565, test it, fix the usual failures, or skip it with a tunnel.
Read the guide8 minutesUpdated September 2026Beginner
How to Install Java 25 for Minecraft on Windows, macOS, and Linux
The Java version every Minecraft version needs, and how to install 25 on each OS.
Read the guide10 minutesUpdated September 2026Intermediate
How to Update a Minecraft Server to 26.2 (from 1.21 or 26.1)
The safe order for a 26.2 upgrade, what changed since 1.21, and how to roll back.
Read the guide9 minutesUpdated September 2026Beginner
Minecraft "Connection Refused" Error: Every Cause and How to Fix It
What refused vs timed out means, and the eight causes to check in order.
Read the guide7 minutesUpdated September 2026Beginner
"Failed to Verify Username" in Minecraft: Fixes for Players and Server Owners
The two-minute player fix, then the server-side causes when that fails.
Read the guide10 minutesUpdated September 2026Intermediate
Minecraft Server Out of Memory: Fix "Java heap space" and Watchdog Crashes
Read the crash line, size the heap correctly, then cut the load that caused it.
Read the guide