fastnetmon generate data with nping [root@localhost ~]# nping -c 100000 --tcp -p 80,433 20.20.20.178 Starting Nping 0.6.47 ( http://nmap.org/nping ) at 2015-07-07 14:45 PDT SENT (0.0089s) TCP 20.20.20.1:19853 > 20.20.20.178:80 S ttl=64 id=20020 iplen=40 seq=980459948 win=1480 RCVD (0.0092s) ICMP [20.20.20.178 > 20.20.20.1 Destination host 20.20.20.178 administratively prohibited (type=3/code=10) ] IP [ttl=64 id=44494 iplen=68 ] SENT (1.0092s) TCP 20.20.20.1:19853 > 20.20.20.178:433 S ttl=64 id=20020 iplen=40 seq=980459948 win=1480 RCVD (1.0096s) ICMP [20.20.20.178 > 20.20.20.1 Destination host 20.20.20.178 administratively prohibited (type=3/code=10) ] IP [ttl=64 id=44832 iplen=68 ] SENT (2.0106s) TCP 20.20.20.1:19853 > 20.20.20.178:80 S ttl=64 id=20020 iplen=40 seq=980459948 win=1480 RCVD (2.0109s) ICMP [20.20.20.178 > 20.20.20.1 Destination host 20.20.20.178 administratively prohibited (type=3/code=10) ] IP [ttl=64 id=45231 iplen=68 ] SENT (3.0121s) TCP 20.20.20.1:19853 > 20.20.20.178:433 S ttl=64 id=20020 iplen=40 seq=980459948 win=1480