Version Matrix
Last modified: 26 April 2026
Allowed by default
| Minecraft line | Protocol ids | Status |
|---|---|---|
| 1.21 to 1.21.11 | 767-774 | Default allowlist. |
Blocked when enabled
Everything outside the configured allowlist is blocked when compatibility.protocolGate.enabled is true. That includes older protocol lines, newer unknown lines, and broken or unmapped clients when blockUnknown is true.
Review after updates
After Minecraft, Velocity, PacketEvents, or ViaVersion updates, confirm the protocol id before expanding the list. Guessing here is how compatibility features become false positives.