net-mgmt/2ping/pkg-descr


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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.

WWW: http://www.finnie.org/software/2ping/