ICP port: The port number where Squid sends and receives ICP requests to and from neighbor caches. Default is 3130. To disable use "0". May be overridden with -u on the command line.
Incoming TCP Address: Defaults to none. Defines the HTTP socket which accepts connections from clients and other caches.
Outgoing TCP Address: Defaults to none. Defines the HTTP socket for connections made to remote servers and other caches.
Outgoing UDP Address: Defaults to none. Defines the ICP socket receiving packets from other caches.
Incoming UDP Address: Defaults to none. Defines the socket for ICP packets being sent out to other caches.
TCP receive buffer: Size of the TCP buffer. Defaults to the OS receive buffer.