So your full command: %JAVA_HOME%\java.exe -XX:+UseParallelGC -Djava.net.preferIPv4Stack=true -jar UBNT_Discovery_Tool_v2.5.1.jar
you just downloaded rather than using the default system command. 2. Check Your Firewall and Network Profile ubnt discovery tool v251 and java on windows 10 updated
If the tool launches and immediately crashes, or gives a security error, you need to add it to the Java Exception Site List. So your full command: %JAVA_HOME%\java
$broadcast = [System.Net.IPAddress]::Parse("255.255.255.255") $udpClient = New-Object System.Net.Sockets.UdpClient(10001) # This is a simplified probe – Ubiquiti uses a proprietary payload. or gives a security error
The Discovery Tool uses and UDP port 10001 . Windows 10’s firewall, especially after the “2023-11 Cumulative Update,” aggressively blocks raw socket access for non-signed Java apps.