The Cisco AnyConnect Secure Mobility client is a web-based VPN client that does not require user configuration. VPN, also called IP tunneling, is a secure method of accessing USC computing resources.What port does Cisco AnyConnect VPN client use?
Cisco AnyConnect VPN connected through a firewall. However, AnyConnect will try to use the DTLS protocol first which uses UDP port 443, if it fails than the client will fall back to use SSL for the transport of user data. The reason that AnyConnect prefers DTLS is that DTLS has less delay because of the connectionless nature of UDP and thus performance is better then with a SSL tunnel.