Security tool for all Sysadmins Nmap is a tool for security conscious system administrators, version 4.50 has been released. This is one tool that gets a lot of use from me, it makes finding insecure machines on the network so so much easier. If you're new here, you may want to subscribe to my RSS feed or learn more about me, Ben Hamilton or link to me via LinkedIn. I can be found tweeting at @benhamilton. Thanks for visiting!