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These filters go beyond general packet filtering: they verify traffic using a challenge-response mechanism, effectively blocking attack traffic that would otherwise appear legitimate to a generic filter. All game filters listed below are enabled by default for the specified port ranges.

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Available game filters

Protocol: TCP and UDPDefault ports: 30000–32000FiveM protection operates at Layer 4 by default. A Layer 7 filter via our Layer 7 Cluster is also available request it by opening a support ticket.Layer 7 filter behaviour:
  • Caches /info.json, /players.json, and /dynamic.json for 1 minute
  • Custom modded content is not cached
  • Strict rate limits are enforced, clients that exceed the limit are banned for 8 hours
Protocol: TCPDefault ports: 25565–26000Covers the standard Java Edition port range. Only traffic matching the Minecraft Java protocol is permitted on these ports.
Protocol: UDPDefault ports: 19100–19200Covers Minecraft Bedrock Edition, which uses UDP. This is a separate filter from the Java Edition filter above.
Protocol: UDPDefault ports: 27000–28000Covers Source Engine games (CS2, TF2, Garry’s Mod, and others).
Custom modded servers that serve downloadable content must configure FastDL. Without FastDL, client downloads will not work correctly or is very slow while the filter is active.
Protocol: UDPDefault ports: 7100–7200Dedicated filter tuned to the SCP: Secret Laboratory game protocol.
Protocol: UDPDefault port: 40140Singleport filter for BeamNG.drive multiplayer sessions.
Protocol: UDPDefault ports: 28015–28100
Protocol: UDPDefault ports: 34100–34200
Protocol: UDPDefault ports: 8200–8300

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Summary table

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Requesting a custom game filter

If your game is not listed above, Packets Decreaser can implement a custom filter tailored to its protocol.
Contact support with the game name, protocol (TCP/UDP), and the port range your server uses. The team will assess whether a dedicated filter is feasible and advise on implementation.