What is the difference between set, setr and sets?

set defines a server-side convar; setr also replicates it to clients; sets adds it to the server's public info (listing). The official docs do not detail these rules: this tool only flags a mix on the same convar.

Why open the port for both TCP and UDP?

The official documentation declares the endpoint in both TCP and UDP on the same port (30120); the firewall must therefore allow both protocols.

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Convar and port checker

Paste your server.cfg: detects missing TCP/UDP endpoints, license key, slots vs OneSync, set/setr/sets duplicates and gives firewall rules.

Last updated: 10/9/2026

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Documentation

server.cfg

Paste the full content of your file.

server.cfg

Results

Waiting for a file.

No endpoint_add_tcp / endpoint_add_udp: add them (port 30120 in the official docs).

sv_licenseKey missing or still "changeme": the server will refuse to start.

No sv_hostname: the server will have no name in the list.

Server installation guideNo server yet? Install it locally or on a VPS / dedicated server, ports and firewall included.

How to use Convar and port checker?

A badly written server.cfg is the first cause of an unreachable FiveM server. This tool reads your file locally and reports common mistakes with the line number.

Open your server.cfg and copy all of its content.
Paste it in the text area: the analysis updates as you type.
Fix the errors (red) first, then the warnings (orange).
Copy the generated firewall commands for the detected ports (ufw or Windows).
Restart the server and check that it shows up in the list or answers a direct connection.

Read the full documentation →