ESP load balancing support

configname: CONFIG_IP_VS_PROTO_ESP

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>IP virtual server support (EXPERIMENTAL)
└─>ESP load balancing support
In linux kernel since version 2.6.12  
This option enables support for load balancing ESP (Encapsulation
Security Payload) transport protocol. Say Y if unsure.