Troubleshooting: FXServer is not responding! (How to fix)

When your FXServer shows “not responding” errors, you’re typically dealing with one of five core issues. This guide provides systematic troubleshooting steps for FiveM server administrators experiencing connectivity failures between txAdmin and FXServer.

Primary Cause: Port Configuration Mismatch

Issue: txAdmin cannot connect to FXServer due to incorrect port configuration in server.cfg

Fix: Verify your server.cfg contains matching TCP/UDP endpoints:

endpoint_add_tcp "0.0.0.0:30120"
endpoint_add_udp "0.0.0.0:30121"

Replace port numbers with your allocated ports. If port numbers don’t match your primary allocation port, connection errors occur.

Validation steps:

1. Check txAdmin Settings → FXServer for configured ports
2. Compare with server.cfg endpoint declarations
3. Restart server via console after corrections

Secondary Cause: txAdmin Monitor Connectivity

Issue: txAdmin:Monitor cannot connect to FXServer, causing “FXServer is not responding!” messages

Root causes:

• FXServer not responding to TCP endpoint (resource stuck)
• FXServer and txAdmin sharing same TCP port
• FXServer not listening to local interface

Fix: Launch FXServer in monitor mode:

# Windows
./FXServer.exe

# Linux  
./run.sh

Critical: Do not use +exec arguments when launching txAdmin. txAdmin requires FXServer to run in monitor mode.

Antivirus Interference (Windows)

Issue: Microsoft Defender Antivirus scanning FXServer directory causes slow startups and connectivity timeouts

Fix: Add FXServer directory to exclusion list:

# Run as Administrator
Add-MpPreference -ExclusionPath "C:FXServer"

Replace path with your actual FXServer directory location.

Network Configuration Issues

Issue: NAT/gateway masking UDP source ports or improper port forwarding

Fix checklist:

1. Forward TCP and UDP ports in router/firewall
2. Verify Windows Firewall allows FXServer.exe
3. Check NAT configuration for UDP port preservation
4. Test local connectivity: telnet localhost 30120

Resource Blocking Startup

Issue: Stuck resources prevent FXServer from responding to health checks

Diagnostic approach:

1. Start server with minimal resources
2. Add resources incrementally to identify culprit
3. Check console for resource error messages
4. Remove or fix problematic resources

Server.cfg testing configuration:

# Minimal startup for testing
ensure mapmanager
ensure chat
ensure spawnmanager
# Add other resources one by one

Advanced Troubleshooting

Health check failures: Monitor shows “HealthCheck request error: connect ECONNREFUSED” indicating complete connectivity loss.

Verification steps:

1. Confirm FXServer process running: tasklist | findstr FXServer
2. Check port binding: netstat -an | findstr :30120
3. Review txAdmin logs for specific error patterns
4. Test with fresh server.cfg using default FiveM configuration

Uncertainty note: Some connectivity issues may stem from hosting provider network configurations or regional firewall policies that aren’t immediately apparent from server logs.

Configuration Validation

Required server.cfg elements:

# Essential for server listing
sets sv_projectName "Your Server Name"
sets sv_projectDesc "Your Server Description"

# Correct endpoint configuration
endpoint_add_tcp "0.0.0.0:30120"
endpoint_add_udp "0.0.0.0:30121"

# Enable txAdmin integration  
start txAdmin

Servers display errors if sv_projectName and sv_projectDesc aren’t set.

Resolution Priority

1. First: Verify port configuration in server.cfg
2. Second: Launch FXServer without +exec arguments
3. Third: Add antivirus exclusions
4. Fourth: Check network/firewall settings
5. Fifth: Isolate problematic resources

Most “FXServer is not responding” errors resolve through correcting port mismatches between server.cfg endpoints and txAdmin configuration, followed by ensuring proper monitor mode startup procedures.

Practical checklist

Use this guide as a staging checklist before changing a live FiveM server. Confirm the current server artifact version, framework version, resource dependencies, database changes, and any client-side files before you apply the change.

• Back up the affected configuration files and database tables.
• Apply the change on a test server first.
• Watch the server console and client F8 console for errors.
• Check whether the change affects jobs, inventory, vehicles, maps, voice, permissions, or player data.
• Document the exact file, command, or setting you changed so it can be reverted quickly.

Testing before production

After the first test, join with a normal player account and repeat the flow from the player perspective. If the topic involves performance, measure before and after with the same player count, route, and resource set. If it involves admin tools or permissions, verify both allowed and denied users.

Common mistakes

Most FiveM issues come from missing dependencies, stale cache, wrong folder names, framework mismatch, or configuration copied from another server. Avoid changing multiple systems at once; make one change, test it, and then continue.

Related resources

For production-ready assets, compare paid resources in the FiveMX shop. For free resources, browse free FiveM scripts and test each resource before using it publicly.

Production rollout notes

Before using this guidance on a live FiveM server, define the exact outcome you expect from the change. For Troubleshooting: FXServer is not responding! (How to fix), that means checking which resource, setting, command, or workflow is affected and confirming that the change fits your current framework, artifact version, and server rules. Keep the rollout small enough that you can reverse it quickly if players report errors.

Use a staging server with the same framework, database schema, resource order, and key dependencies as production. If the topic changes gameplay, permissions, visuals, voice, vehicles, maps, inventory, or economy behavior, test with at least one admin account and one normal player account. Watch server console output, client F8 logs, and resource timing while repeating the exact player flow that will happen on the live server.

Rollback checklist

• Save the previous configuration file, resource folder, and database state before changing anything.
• Record the resource version, commit, download page, or setting value you tested.
• Restart only the affected resource first when possible, then restart the full server if dependencies require it.
• If errors appear, revert the single changed resource or setting before testing another fix.

Maintenance guidance

Review this setup again after FiveM artifact updates, framework updates, or major resource changes. A configuration that works today can break after dependency updates, renamed exports, changed events, or database migrations. Keep notes with your server documentation so future admins understand what was changed, why it was changed, and how to verify it again.

Ongoing review

Recheck Troubleshooting: FXServer is not responding! (How to fix) after major FiveM artifact updates, framework changes, or resource migrations. Confirm that the advice still matches current server behavior, that any linked source remains available, and that installation steps still match the files a server owner will actually download or configure.

For public servers, keep a short changelog beside your server documentation. Note what was tested, what changed, which accounts were used for verification, and how to roll back. This makes future maintenance faster and prevents old setup notes from becoming unclear or unsafe for players.