config FREETZ_PACKAGE_PINGTUNNEL bool "Pingtunnel-0.61 (binary only)" default n select FREETZ_LIB_libpcap help Ptunnel is an application that allows you to reliably tunnel TCP connections to a remote host using ICMP echo request and reply packets, commonly known as ping requests and replies. At first glance, this might seem like a rather useless thing to do, but it can actually come in handy in some cases.