The Hypertext Caching Protocol is an alternative to ICP. It provides better security
and better cache hit predictions. However, HTCP messages are larger
and more complicated. HTCP must be enabled at compile-time with the
This directive specifies the UDP port Squid uses to send and receive HTCP queries and replies. You may only specify one HTCP port number. As with ICP, the udp_incoming_address and udp_outgoing_address directives also control HTCP packets.
You may configure Squid to receive both ICP and HTCP queries at
the same time. Setting htcp_port to
0 disables HTCP.
icp_port, http_port, udp_incoming_address, udp_outgoing_address, cache_peer