Does Ipsec Support Multicast?

Yes, IPSec does natively support multicast encryption. This is called “Group Encrypted Transport” (GETVPN).

Does VPN support multicast?

To enable streaming IP video broadcasts over the internal network, VPN tunneling features Internet Group Management Protocol (IGMP) gateway multicast proxy support.

Does IPsec support ICMP?

IPsec naturally has to interact with every protocol of the IP suite, and in particular the Internet Control Message Protocol (ICMP). The goal of ICMP is to exchange control and error messages, like packet processing error notifica- tions. ... Assessing the correct packet size on a network path is therefore a key aspect.