The X3 Ethernet port default is set to dynamic UDP.
This can be changed using the PAC configuration tool. Through an internet browser you can connect through port 81. With the default it would be http://192.168.10.50:81/
If you do not know the IP Address of the PAC, you can use the Push Button to log the IP Address. If you press and hold the button, it will record a time stamp and IP Address of both X2 and X3 Ethernet ports. A log file named "IPAddresses.log" will be created on the root directory of the SD card. The Push button is located next to the SD Card:
The default Username is Admin and Password is left blank.