Configure the firewall

Go to Firewall > Rules, WAN tab and click + to create a new rule.

Enter these values:

Action	Pass
Disabled	not checked
Interface	WAN
Protocol	UDP
Source	unchecked, any
Destination	unchecked, WAN address
Destination port range	from OpenVPN to OpenVPN
Log	only check when troubleshooting
Description	OpenVPN RADIUS

Click Save and the rules page will reload. Do not forget to click Apply Changes.