Project Zomboid Server – Dedicated, Ports 16261, RAM, Mods

Quick answer: A Project Zomboid dedicated server runs 24/7 via SteamCMD, needs UDP 16261 + 16262 and RAM by player count – not slot plans.

Port	Proto	Use
16261	UDP	Game
16262	UDP	Steam query

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Frequently asked questions (FAQ)

Which port for Project Zomboid dedicated?

Default: UDP 16261 (game) and UDP 16262 (Steam). Open both in UFW and the provider firewall.

Co-op host or dedicated?

Co-op dies when the host goes offline. Dedicated runs 24/7 via SteamCMD app 380870 and needs more RAM.

How much RAM?

2–4 players: 4 GB. 8–16: 8 GB. Heavy mods/maps: 12 GB+.

Mods on dedicated?

Workshop IDs in server INI / mods.txt. Clients need the same mods. Restart after Workshop updates.

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