6 .Nd Tool to probe for TCP ECN related incompatibilities in the network
9 .Op Fl n Ar target hostname or ipaddress
10 .Op Fl p Ar target port
13 .Op Fl w Ar source port
14 .Op Fl s Ar source ip address
15 .Op Fl f Ar file name to get
16 .Op Fl d Ar interface name
20 utility can be used to test TCP ECN related incompatibilities in the network.