Adjust PC game behavior and settings with Special K, a toolkit for various game-related functions.
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24 alternativesLAN Fix
Adjust ZeroTier network interface settings on Windows to help multiplayer games work over local networks.
About LAN Fix
LAN Fix is a Windows batch-script repository that automates changes to ZeroTier network interface settings so multiplayer games can work over local area networks. It sets IPv4 InterfaceMetric on ZeroTier adapters to 1 and IPv6 to 20, and installs a scheduled task that reapplies these settings each time a ZeroTier network reconnects.
The project is a self-described vibe-coding repository built with AI assistance, with no automated tests, CI, or professional code review. It targets typical home setups (Windows 10/11, ZeroTier 1.14–1.16, a handful of peers). Edge cases, managed Windows environments, and future ZeroTier versions may not work. It modifies the network stack with admin rights, and the broadcast/multicast step depends on managed routes that may be limited on ZeroTier's free tier; alternatives include self-hosting a ZTNET controller or paying for a higher tier.
Key features
- Sets IPv4 InterfaceMetric to 1 on ZeroTier adapters so games prefer ZT.
- Sets IPv6 stack metric to 20 to deprioritize it in route selection.
- Installs a Windows scheduled task that reapplies settings on every ZeroTier reconnect.
- Adds local 255.255.255.255/32 broadcast routes on Windows clients.
- Provides install and uninstall batch scripts; no coding required.
- Includes Check_Network_interfaces.bat diagnostic for troubleshooting.
Best for: Windows 10/11 users running ZeroTier for small LAN gaming groups who want network settings automatically restored after reconnects.
Good for
- Automates reapplying ZeroTier network settings on each reconnect.
- Works for typical home gaming setups: Windows 10/11, ZeroTier 1.14–1.16, handful of peers.
- Open-source and intended as a starting point that users can adapt.
Watch out for
- No automated tests, CI, or professional code review; built with AI assistance.
- Edge cases, exotic networks, enterprise/managed Windows, or future ZeroTier versions may break.
- ZeroTier free tier may not allow the two managed routes the fix expects, so multicast discovery can remain broken.
LAN Fix at a glance
- Category
- Gaming › Game Utilities & Launchers
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Windows
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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LAN Fix FAQ
Does the fix need administrator rights?
Yes, it modifies the network stack with admin rights; the README advises backing up first and running at your own risk.
What ZeroTier controller routes does it require?
The broadcast/multicast step expects two managed routes (255.255.255.255/32 and 224.0.0.0/4). On a free ZeroTier account, options include adding only the broadcast route, self-hosting a ZTNET controller, or paying for a tier that lifts the route limit.
What should I do if the fix doesn't work?
Read the Check_Network_interfaces.bat output, open an issue with the diagnostic, and treat the fix as a starting point you can adapt.
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