.Dd 5/7/2015 .Dt ecnprobe 1 .Os Darwin .Sh NAME .Nm ecnprobe .Nd Tool to probe for TCP ECN related incompatibilities in the network .Sh SYNOPSIS .Nm .Op Fl n Ar target hostname or ipaddress .Op Fl p Ar target port .Op Fl m Ar mss .Op Fl M Ar mtu .Op Fl w Ar source port .Op Fl s Ar source ip address .Op Fl f Ar file name to get .Op Fl d Ar interface name .Sh DESCRIPTION The .Nm utility can be used to test TCP ECN related incompatibilities in the network.