Network Blocker
by decce6
Network Blocker lets a player stop unwanted network connections from the game, keeping only the ones Minecraft needs.
What it does
Only connections to Minecraft services and the authentication they require are allowed by default, and other outgoing connections are blocked. Allowed IP addresses can be changed in the configuration file, and a log shows which connections were blocked. The mod runs on the client only, so a server does not need it and players join without installing anything. It is published for Fabric, Forge, NeoForge and Quilt across 23 release versions, 1.20.1 – 26.3, and is open source under the GNU Lesser General Public License v3.0 only.
Key features
Default allow list
Only Minecraft services and the authentication they need are permitted unless the configuration changes that.
Editable IP allowances
Additional IP addresses can be allowed by editing the configuration file.
Blocked connection log
A log records the connections that were blocked, so the player can see what was stopped.
Compatibility
Latest build for each game version and loader.
26.x5 of 5 versions with builds
1.21.x12 of 12 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
In the catalog
Network Blocker is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 8,071 mods support Minecraft 26.3.
More from decce6
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What the author says
Network Blocker is a utility mod that allows you to block unwanted network connection. By default, only connections to Minecraft services are permitted, which are necessary for authentication, etc. IP connections are also allowed, but this can be changed in the configuration file. By observing the log, you can know…
Official listing
- Modrinth page
- modrinth.com/mod/networkblocker
- Owner
- decce6
- Published
- 2026-02-01
- Updated on Modrinth
- 2026-04-18
- Facts verified
- 2026-10-15