Check NAT type

Right-click the configuration list and select the "NAT Discovery" menu.

In the pop-up dialog box, you can see your NAT Type and NAT Behavior.

Possible NAT types:

• EasyNAT
• HardNAT

Possible NAT behaviors:

• BehaviorNoChange
• BehaviorIPChanged
• BehaviorPortChanged
• BehaviorBothChanged

To change the STUN server, edit the configuration and navigate to the Basic tab and put your STUN server address in the STUN Server field. If you don't want to create a configuration, navigate to the Preferences tab and click the "Set Defaults" button, put your STUN server address in the STUN Server field in the pop-up dialog box.