mc-traffic-control
by ole101
mc-traffic-control lets a player decide which packets the Minecraft client sends and receives, applied from the client side alone.
What it does
The mod gives the client a way to control its own packet traffic. A player can block specific outgoing or incoming packets, and can filter custom payloads by their channel identifier. Blocking acts only on the local client, so the server is not told about it and keeps working as usual. Only the client needs the mod, and players join servers without installing anything extra.
Some fields can be changed as well. The mod can override the client brand that is sent to servers, and it can inspect default data components, items, containers and screens that have been patched. The code is released under the MIT License and is open source, with a public source repository and issue tracker. Installation needs Fabric API and Mod Menu, both required dependencies, on the Fabric loader. Files are published for 26.2 only, with version 1.3.0 as the latest file, dated 2026-09-16.
Key features
Packet blocking
Specific outgoing and incoming packets can be blocked on the client, chosen by packet type.
Custom payload filtering
Custom payloads can be blocked by their channel identifier in either direction.
Client brand override
The brand string the client reports to servers can be replaced with another value.
Data inspection
Patched default data components, items, containers and screens can be examined from the client.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Privacy-minded play
A player can limit which custom channels and brand details reach a server without changing the server itself.
Debugging network traffic
Blocking selected packets lets a player isolate how a mod or server behaves when a given message is missing.
Who it’s for: Players who want control over what their client sends and receives, and modders checking how a server reacts to missing or altered packets. Server owners do not need to install anything for it to work.
How it compares
Fabric Packet Logger is client-side only, open source under the MIT License, and covers 1.21 – 26.2, so it suits logging more than blocking. Packet Ninja is also client-side only and open source under the GNU Lesser General Public License v3.0 only, but its files cover 1.21.8 – 1.21.11, a narrower range than this mod's 26.2 build. Firewall runs on either side, is open source under the MIT License, and is published for 1.21 – 26.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| mc-traffic-control | Fabric | 26.2 | Client-side only | 2026-09-16 |
| Fabric Packet Logger | Fabric | 1.21 – 26.2 | Client-side only | 2026-08-13 |
| Packet Ninja | Fabric | 1.21.8 – 1.21.11 | Client-side only | 2026-03-28 |
| Firewall | Fabric | 1.21 – 26.2 | Client or server, optional | 2026-08-27 |
Questions
Does mc-traffic-control need Fabric API and Mod Menu?
Does a server need mc-traffic-control installed?
Which game versions does mc-traffic-control support?
In the catalog
mc-traffic-control is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 13,894 mods support Minecraft 26.2.
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What the author says
mc-traffic-control is a small mod that allows you to control the client-side traffic in Minecraft.
Official listing
- Modrinth page
- modrinth.com/mod/mc-traffic-control
- Owner
- ole101
- Published
- 2026-08-08
- Updated on Modrinth
- 2026-09-16
- Facts verified
- 2026-10-15