Click “Save” to apply these changes. After some time, or if you restart your device, the error message should no longer be visible. Logs: Enable logging if you wish to log activity which can be later retrieved as described in this article.ģ. Fill out these fields similar to the following example, using the IP address of the machine / device hosting the UniFi Network application in the Forward IP field, and UDP ports 3478 in both port fields: Name: give the new rule a name to be able to recognize it later.Įnabled: make sure to check the box to "enable this port forward rule" to make it active.įorward IP: the IP address of your UniFi Network application host. To do this with a USG, go to Settings > Routing & Firewall > Port Forwarding and click "Create New Port Forward Rule" to create a new rule.Ģ. If you have another router, follow a similar method using the router’s configuration method.ġ. NOTE:The following directions require the presence of a UniFi Security Gateway to be effective.
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How to Add a STUN Port Forwarding Rule in UniFi If you are using UniFi Network to manage devices that are not located behind the same router, you will need to set up a port forward similar to how you created one for the inform packets to be forwarded to the application using port 8080. To resolve this, make sure to open UDP port 3478 on the firewall of the machine hosting the UniFi Network application, and ensure that your router is properly relaying STUN traffic to the UniFi Network application from the UniFi devices. In cases where this persists for longer periods of time, this error message most often results from a connectivity issue with STUN from the device to the UniFi Network application. If this issue is encountered immediately after initial device adoption, try refreshing the application page/giving this a few minutes for STUN to properly connect.
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It is only visible now because the error message itself was added to the application user interface in that software version. This doesn't reflect an issue with STUN on these versions, rather it is bringing attention to a previously existing issue. Why has this error suddenly appeared?Ī number of UniFi administrators may have noticed the sudden appearance of this error after upgrading to UniFi Network versions 5.6.x+. UniFi requires STUN connectivity for a variety of functions, for example, locating devices through the application user interface, as well as to initiate contact and communicate details from the device to the application. In order for STUN communication to work properly, the UniFi device must be able to resolve to the UniFi Network application via the inform URL and communicate with the address via port 3478. In this case, the application acts as the STUN server. UniFi devices use STUN to properly communicate with the UniFi Network application. STUN when used by a particular application, will go and initiate a connection with a public STUN server and request to know what address will be used by the STUN server to communicate with the device through its router. This is necessary because the devices in your network have individual IP addresses that are used to communicate internally, but not known to servers/clients outside of your network. In simple terms, STUN provides a way for devices to securely communicate with other devices when they're located behind a router. STUN stands for Session Traversal Utilities for NAT and includes a set of protocols used in networking to better handle communication when going through network address translation (NAT). This document will explain what these errors mean and how to troubleshoot and resolve them. This error indicates that the Network application is not able to properly connect via the STUN protocol with this particular device, which can prevent some of the features in UniFi Network like device Debug Terminal from working properly.
If you click on the device and expand the error at the top of the device properties pane you will see a "STUN Communication Failed" error.
UDP Port 3478 must be open inbound on the Network application's host. In order for STUN to work properly, the client devices need to be able to resolve to and communicate over UDP port 3478 with the UniFi Network application.
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