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If a Conan Exiles dedicated server cannot be joined, start with the port roles: game traffic normally uses UDP 7777, the server-browser pinger uses UDP 7778, and server queries use UDP 27015. Direct connect uses your public address and the game port, such as public-address:7777—not port 27015. Forward those UDP ports to the server computer’s current private IP, permit them through the host firewall, and verify the server is actually listening before troubleshooting the browser.
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Which Conan Exiles ports must be reachable?
Conan Exiles separates gameplay, browser discovery, administration, and optional mod delivery. A timeout on one port does not necessarily mean every service is broken. Configure only the ports required for the service you intend to use, with the correct protocol.
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| Port | Protocol | Role | Where it is configured |
|---|---|---|---|
| 7777 | UDP | Main game traffic | Engine.ini, [URL], Port= |
| 7778 | UDP | Server-browser pinger; always the game port plus one | Derived from the configured game port |
| 27015 | UDP | Server query and discovery | Engine.ini, [OnlineSubsystemNull], GameServerQueryPort= |
| 25575 | TCP | RCON remote administration | Game.ini, [RconPlugin], RconPort= |
| 7777 plus the configured offset | TCP | On-demand mod transfer for applicable PC clients | ModFileDownload.DownloadPortOffset |
Funcom’s documentation describes the defaults as listening on UDP ports 27015 and 7777. The pinger is related to the game port, so a server moved from 7777 must also move its pinger from 7778 to the next port. Query, pinger, and game traffic are separate functions; opening TCP 25575 will not make gameplay reachable, and opening UDP 27015 will not replace UDP 7777.
What each port does—and what a failure looks like
UDP 7777: the connection players actually use
The game port carries the session traffic needed to join and play. For a default server, a player entering public-address:7777 is targeting this port. If it is blocked, direct connect normally times out even when the server appears in a list.
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UDP 7778: the browser pinger
The pinger is the game port plus one by design. With the default game port, it is UDP 7778. It helps the server browser determine that a server is present and responsive. A missing pinger rule can leave a running server invisible or intermittently absent from the browser while direct connect still works.
UDP 27015: query and discovery
The query port supplies server information used by discovery systems. It is not the port to append for direct connect. Entering public-address:27015 when the game is listening on 7777 targets the wrong service.
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TCP 25575: RCON
RCON is a separate remote-administration channel. Configure its port under [RconPlugin] in Game.ini. Do not expose it unnecessarily: anyone who can authenticate to RCON may administer the server, so restrict access in the firewall and use strong credentials.
TCP mod-transfer traffic
For applicable PC clients, on-demand mod delivery uses TCP on the game-port value plus the configured ModFileDownload.DownloadPortOffset. This is not a reason to open every nearby TCP port. Determine the offset in your configuration and permit only the resulting port if your server uses this feature.
First check: is the server listening?
Port forwarding cannot repair a process that is stopped or bound to a different port. Before editing the router, start the dedicated server and inspect its log or process state. Look for the configured game and query ports and confirm that startup completed without a bind or address error.
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- Verify the dedicated-server process remains running after launch.
- Check the log for the game port, query port, and any bind or “address already in use” message.
- Confirm that another Conan client or server on the same computer has not claimed the default ports.
- Record the host’s current private IPv4 address; this is the address the router must target.
If the log shows a different port from the one you forwarded, use the log and configuration as the source of truth. A successful process launch alone does not prove that the WAN path is open.
Verify the configuration in Engine.ini and Game.ini
Game port
Open the server’s Engine.ini and locate the [URL] section. The default is:
[URL]
Port=7777If you choose another game port, replace 7777 with that value. The pinger then follows automatically as game port plus one; for example, game port 7779 makes the pinger 7780.
Query port
In Engine.ini, locate [OnlineSubsystemNull] and check:
[OnlineSubsystemNull]
GameServerQueryPort=27015Use your chosen query value if it has been changed. Keep it distinct from the game port and from ports used by other server instances.
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RCON port
If remote administration is enabled, check Game.ini for [RconPlugin] and its RconPort= value. The documented default is TCP 25575. A firewall rule for RCON must be TCP; a UDP rule on 25575 does not provide the same service.
Configuration consistency
After editing an ini file, stop and restart the dedicated server. Then re-check the startup log. Router rules, operating-system firewall rules, and any launcher test must all use the same final values.
Forward the ports to the correct computer
- Reserve the server’s LAN address. In the router’s DHCP or LAN settings, create an address reservation for the server computer. This prevents a reboot or lease renewal from assigning a different private IP.
- Create UDP forwarding rules. Forward the configured game port, its game-port-plus-one pinger, and the configured query port to that reserved address. With defaults, that means UDP 7777, UDP 7778, and UDP 27015.
- Add optional service rules only when needed. Forward TCP 25575 only if you use RCON. For mod transfer, calculate the game port plus the configured download offset and forward that TCP port when the feature applies to your clients.
- Save and apply the router configuration. Some routers require a separate Apply, Commit, or reboot action. Confirm that the rule is enabled and points to the server’s current address, not an old DHCP lease.
A stale destination IP is a common configuration failure: the router can report a perfectly valid rule while sending packets to a different device. Recheck the reservation and the server’s address after every network change.
Allow matching traffic through the host firewall
Port forwarding reaches the LAN only if the server computer accepts the packets. Create inbound rules on the operating system firewall that match both protocol and port. For the default setup, permit UDP 7777, UDP 7778, and UDP 27015. Add TCP 25575 for RCON and the calculated TCP mod-transfer port only when those services are enabled.
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- A UDP rule does not satisfy a TCP service, even when the number is identical.
- A rule limited to a different interface or network profile can appear correct but still block WAN traffic.
- Security software with its own network filter may need an application exception in addition to the operating-system rule.
Funcom notes that a firewall exception may be required for the server to appear in the Steam server browser. Browser visibility therefore requires both a listening server and an allowed pinger/query path.
Test from outside the LAN
Use a device or connection that is not on the server’s local network. A phone on cellular data, a remote friend, or another external connection avoids misleading local results. Some routers do not support NAT loopback (also called hairpin NAT), so testing the public address from inside the same LAN can fail even when outside players can connect.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problems- From an external connection, try direct connect with the public address and the game port, for example
public-address:7777. - If direct connect works but the browser does not list the server, focus on UDP 7778, UDP 27015, and firewall visibility rather than changing the game port.
- If direct connect times out, verify the server log, destination IP, UDP 7777 forwarding, and the host firewall before changing other services.
- If no external test can reach any forwarded port, check whether the router’s WAN address is truly the address assigned by the Internet provider. An upstream router or other carrier-level NAT can prevent inbound forwarding at your own router.
Do not treat a successful test from the server itself as proof of Internet reachability. It tests a local path, not the WAN-to-router-to-host path used by remote players.
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Direct connect targets the game service. Enter the public/WAN address followed by the configured game port:
public-address:7777Replace 7777 if you changed [URL] Port=. Do not substitute the query port 27015. If you are connecting from the same LAN, the router may require the server’s private address instead, depending on its NAT-loopback behavior; remote players should use the public address.
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When the browser does not show a running server
Browser visibility is a different diagnostic branch from gameplay reachability. Work through these checks in order:
- Confirm the server process is running and listening on the configured values.
- Confirm UDP game port, pinger port, and query port all forward to the same current private IP.
- Confirm the host firewall allows those UDP ports and that no security product is filtering the server executable.
- Wait for the browser to refresh, then search by the exact server name or use direct connect as a control test.
- Test from outside the LAN; an internal hairpin failure does not prove that the Internet path is broken.
If direct connect succeeds but the listing remains absent, the game service is reachable and the remaining fault is in discovery, pinger/query forwarding, firewall visibility, or browser refresh—not the basic game-port route.
Resolve port collisions on one host
A local Conan client, another dedicated server, or another application may already use a default port. Two processes cannot reliably bind the same address and port combination. Move the additional server to a coordinated set rather than changing one number in isolation.
| Service | Default set | Example second set |
|---|---|---|
| Game | UDP 7777 | UDP 7779 |
| Browser pinger | UDP 7778 | UDP 7780 |
| Query | UDP 27015 | UDP 27016 |
- Set the second server’s game port to 7779 in
[URL]. - Use 7780 for its pinger, because it remains game port plus one.
- Set
GameServerQueryPort=27016in[OnlineSubsystemNull]. - Update router forwarding and firewall rules for all three values.
- Restart the server and confirm the new bindings in its log.
The example values are a coordinated pattern, not mandatory numbers. Choose unused ports and keep every related setting, forwarding rule, and firewall rule synchronized.
Run the launcher’s port-forwarding test
If your launcher provides the documented test, use the -testportforwarding command with the ports you actually configured. Test the game, pinger, and query values rather than blindly testing a default. Interpret the result alongside an external connection attempt: a launcher test can identify reachability for a specified port, while direct connect confirms that the game service itself accepts a client.
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Diagnose by symptom
| Symptom | Most relevant checks |
|---|---|
| Server process stops or reports a bind error | Inspect the log, find a port collision, and assign a coordinated set to the affected instance. |
| Direct connect times out | Use the public address plus the game port; verify UDP game forwarding, current private IP, listening state, firewall, and WAN address. |
| Server appears in the browser but cannot be joined | Check UDP game port 7777 (or its replacement), not only query/pinger rules; verify the client is using the correct address and port. |
| Direct connect works but browser listing is missing | Check UDP game-port-plus-one and query forwarding, firewall exceptions, and external versus internal testing. |
| RCON cannot connect while gameplay works | Verify Game.ini [RconPlugin], TCP 25575 (or the configured value), credentials, and a TCP firewall rule. |
| Mod download fails for applicable PC clients | Check the TCP port calculated from the game port plus ModFileDownload.DownloadPortOffset, then update forwarding and firewall rules. |
| Rules worked until a reboot | Compare the router’s destination IP with the server’s current lease and create or repair the DHCP reservation. |
Final verification checklist
- The server log confirms the intended game and query ports are listening.
[URL] Port=matches the forwarded UDP game port.- The pinger uses exactly game port plus one.
[OnlineSubsystemNull] GameServerQueryPort=matches the forwarded UDP query port.- Every router rule targets the server’s current reserved private IP.
- Host-firewall rules match UDP or TCP as required by each service.
- Direct connect uses the public address and game port, never the query port.
- Testing is performed from outside the LAN, or NAT-loopback limitations are explicitly accounted for.
- Any second server has its own coordinated game, pinger, and query set.
- Optional RCON and mod-transfer ports are opened only when those services are enabled.
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