I assume that the IP address is just an example, as it is not routable on the Internet.
1. Get an external DNS and point to the IP address, i.e. vpn2.mycompany.net would resolve to <ip address of the anyconnect firewall>
2. Obtain an SSL certificate for vpn2.mycompany.net (example!) and install it on the VPN device, then associate it with the interface/service.
Adam Smith87 it is not what the person is asking. Ivacy VPN is yet another "privacy solution" for individual users. Anyconnect is a user VPN for remote access. Apples vs oranges.