A VIA client tries to initially connect to a corporate office controller through an intermediate firewall. However, the VPN connection fails. The administrator examines the firewall rules and determines that rules for UDP 4500 and UDP 500 are configured.
Which additional protocol must be allowed in the firewall rules to resolve this connection failure?
A. TCP 22
B. UDP 8200
C. ESP
D. TCP 443
https://www.arubanetworks.com/techdocs/ArubaOS_63_Web_Help/Content/ArubaFrameStyles/Defaults/Default_Open_Ports.htm
Required for VIA: During the initializing phase, VIA uses HTTPS connections to perform trusted network and captive portal checks against the controller. It is mandatory that you enable port 443 on your network to allow VIA to perform these checks
The Ports UDP 4500 , UDP 500 and UDP 8200 are needed.
Correct Answer: D