HWID (Anti-Alts)
by lunofe
HWID (Anti-Alts) identifies players by hardware ID so server owners can spot and ban people who return through alternate accounts.
What it does
Server owners use the mod to flag accounts that share a hardware ID, which is a more stable signal than an IP address that changes through VPNs. A list command reveals hardware IDs shared by several players, and matching accounts can be banned automatically based on that identifier. The mod is aimed at servers that deal with players who evade bans, keep returning after removal, or join with fresh accounts made on the same machine.
Client and server both need the mod: the server requires it, and each player has to run it for the hardware ID check to pass on join. Players who try to join with a removed or stripped copy are refused, since the server registers an argument that clients must match. Forge and NeoForge builds exist for 1.20.1 – 1.21.11, with 4.1 as the latest file for each loader, and the code is not open source; it is released under All rights reserved.
Key features
Hardware ID bans
Bans can be applied to a hardware ID, so one ban covers the machine rather than a single account name.
Shared-ID lookup
An in-game command lists hardware IDs that are used by more than one player, making alt accounts easier to find.
Automatic ban rules
Accounts that match a banned hardware ID can be banned automatically when they join the server.
Join check against modified clients
Clients without the required argument are kept out, so removing the mod from the modpack does not allow a join.
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
1.20.x4 of 4 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Servers with repeat offenders
A server that keeps seeing removed players return on new accounts can ban by hardware ID instead of name or IP.
Investigating alt accounts
Staff can search for hardware IDs with several players attached to them to see which accounts share a machine.
Who it’s for: Server owners and moderators who run Forge or NeoForge servers and need to stop players from rejoining through alternate accounts.
Questions
Does HWID (Anti-Alts) have to be installed on the client?
Which loaders does HWID (Anti-Alts) support?
Can a player get around a hardware ID ban with a VPN?
In the catalog
HWID (Anti-Alts) is one of 8,016 Management mods on ModsFinder, and one of 2,698 Management mods for Forge. 19,862 mods support Minecraft 1.21.11.
More from lunofe
Similar mods
What the author says
Are you running a server and occasionally meet some players you want to get rid of, but they keep coming back using alt accounts and a VPN? Well, now you've got the chance to identify their accounts based on a hardware ID instead of unreliable IPs, skins or behaviour!
Official listing
- Modrinth page
- modrinth.com/mod/hwid
- Owner
- lunofe
- Published
- 2023-03-05
- Updated on Modrinth
- 2026-03-03
- Facts verified
- 2026-10-15