menuconfig TCPDUMP bool prompt "tcpdump " select LIBPCAP help Tcpdump prints out the headers of packets on a network interface that match the boolean expression. It can also be run with the -w flag, which causes it to save the packet data to a file for later analysis, and/or with the -r flag, which causes it to read from a saved packet file rather than to read packets from a network interface. In all cases, only packets that match expression will be processed by tcpdump. config TCPDUMP_DISABLE_CRYPTO bool prompt "disable crypto support" depends on TCPDUMP help Select this, if you don't need support for encryption (e.g. IPsec ESP packets)