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2ping, a bi-directional ping utility By Ryan Finnie <email@example.com> http://www.finnie.org/software/2ping/ ABOUT 2ping is a bi-directional ping utility. It uses 3-way pings (akin to TCP SYN, SYN/ACK, ACK) and after-the-fact state comparison between a 2ping listener and a 2ping client to determine which direction packet loss occurs. INSTALLATION 2ping requires Perl 5.6.0 or newer. 2ping requires several Perl modules, all of which are in a standard Perl installation (though your distribution may split Perl into "base" and "standard" packages). Several non-standard packages are required for optional features, and can be installed from you distribution's package management system or CPAN. They are: IO::Socket::INET6 (for IPv6 support) Digest::SHA (for HMAC-SHA1 or HMAC-SHA256 auth support) Digest::CRC (for HMAC-CRC32 support) To "build" and install 2ping: perl Makefile.PL make make test make install make clean /usr/local is the default Makefile prefix, use PREFIX to override. USAGE Please see the man page for full details, but in short, start a listener on the far end: 2ping --listen And run 2ping on the near end, connecting to the far end listener: 2ping $LISTENER Where "$LISTENER" is the name or IP address of the listener.