AntiScan
AntiScan is a Fabric server mod that blocks players who report port scanners, and it can check report attempts against AbuseIPDB.
What it does
AntiScan automatically blocks report server scanners, meaning clients that probe a server for its address and port. It starts with the server, so the protection is active from the first connection after a restart. It blocks port scanners that report on servers, and the author notes that it is meant to be used together with online mode and a whitelist, since no single mod is a complete answer for keeping a server safe.
The mod can optionally use Hunter PebbleHost and an AbuseIPDB check to look up IPs and report scan attempts. The AbuseIPDB check requires an API key added to the configuration. Names and IP addresses can be added to the AntiScan whitelist, and whitelisted players can still connect, while the default Minecraft verification remains in place. Blocked names are written to the log, and the mod can let players bypass online mode on servers that use it by default.
AntiScan is server-side only, so players join without installing it and servers need it alone. It is released under the MIT License and is open source. Files are published for Fabric only, across 23 release versions 1.20 – 26.2, with 2.0.0+26.2.x for 26.2 as the latest build, and snapshot builds are published too.
Key features
Scanner blocking
Clients that scan the server for reports are blocked automatically once the server starts with AntiScan installed.
Whitelist support
Names and IP addresses can be added to the AntiScan whitelist so that trusted connections are allowed through.
AbuseIPDB check
An optional check looks up IPs against AbuseIPDB using a key that the server owner adds to the configuration.
Logging of blocked names
Names that are blocked are written to the log, so the server owner can inspect them after a restart.
Compatibility
Latest build for each game version and loader.
26.x4 of 4 versions with builds
1.21.x12 of 12 versions with builds
1.20.x7 of 7 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
How it compares
AltX is server-side only, open source under the GNU General Public License v3.0 or later, and published for 1.21.1 – 26.3, so it covers a wider range than AntiScan. InvalidPlayerBypassList is server-side only, open source under the CC0 1.0 Universal license and published for 1.21 – 26.1.2. senthryX is server-side only, released under the MIT License, but is not open source and covers only 1.21.1 – 1.21.4.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| AntiScan | Fabric | 1.20 – 26.2 | Server-side only | 2026-07-05 |
| AltX | Fabric | 1.21.1 – 26.3 | Server-side only | 2026-09-17 |
| InvalidPlayerBypassList | Fabric | 1.21 – 26.1.2 | Server-side only | 2026-05-17 |
| senthryX | Fabric | 1.21.1 – 1.21.4 | Server-side only | 2025-06-07 |
Questions
Does AntiScan need to be installed on the client?
What does the AbuseIPDB check need?
Can AntiScan be used with online mode?
In the catalog
AntiScan is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 13,894 mods support Minecraft 26.2.
More from skycatminepokie
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What the author says
Antiscan blocks port scanners and reports them for you. Uses Hunter by PebbleHost and optionally AbuseIPDB to check IPs and report attempts to scan your server. Note that this is NOT a perfect solution, and will NOT keep your server safe on its own. This is meant to be used in conjunction with online mode and a…
Official listing
- Modrinth page
- modrinth.com/mod/antiscan
- Owner
- skycatminepokie
- Published
- 2025-04-11
- Updated on Modrinth
- 2026-07-05
- Facts verified
- 2026-10-15