Connection Packet Fixer

Relaxes packet limits, errors, timeouts, and other connection related issues

73 Downloads

neoforge

Rent Server with this Mod

About this Mod

Connection Packet Fixer

Relaxes packet limits, connection timeouts, packet decode exceptions, and payload issues.

Details

Raises common login, compression, chunk, and NBT packet limits.
Extends login, read, and keepalive timeouts.
Bounds slow disconnect cleanup so closed channels do not hang forever.
Blocks repeated malformed pre-login traffic.
Can suppress client disconnects from signed chat verification failures.

Available Versions

ConnectionPacketFixer 1.0.0release

MC 1.21.1neoforge

June 3, 2026

How to Install Connection Packet Fixer on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "Connection Packet Fixer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Connection Packet Fixer server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Connection Packet Fixer compatible with neoforge?

Connection Packet Fixer officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Connection Packet Fixer – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Connection Packet Fixer consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.