WHIC PORT IS FOR AVAST SECURE LINE ?

hi there iwanna know about avast secure line’port for ios ?
protocol is ikev2 yeah?ok so which port is use for it?500?
thanks

https://blogs.technet.microsoft.com/rrasblog/2006/06/14/which-ports-to-unblock-for-vpn-traffic-to-pass-through/
http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml

Thanks Eddy for the links.

The protocol is IKEv2 (IPSec type). If you are having troubles to connect, please try to unblock ports 4500 and 500 on your router.

Hope it helps!