Many are quite taken by the new network scanners available today. One example is zmap, which is an impressive offering focused around large-scale Internet testing that offers some extraordinary scanning speeds.
I still prefer
Happily, I’m not sacrificing much speed. Nmap has been devoting significant effort to performance over the last couple of years. Here’s a quick portscan of a host on my network.
nmap -p- victim
Starting Nmap 6.40 ( http://nmap.org ) Nmap scan report for victim (172.16.24.17) Host is up (0.0035s latency). Not shown: 65530 closed ports PORT STATE SERVICE 4021/tcp open unknown 9147/tcp open unknown 3006/tcp open unknown 22/tcp open unknown 74/tcp open unknown Nmap done: 1 IP address (1 host up) scanned in 1.91 seconds
65,536 ports in less than 2 seconds. I remember when that would have taken close to a minute.
Don’t give up on Nmap. It has tons of history, a myriad of new features, and plenty of speed.
[ PROTIP: Replace
ncat—an Nmap project. ]