Nmap is een programma voor het verkennen en controleren van een netwerk. Het is ontworpen om zonder vertragingen een groot netwerk te scannen, maar het werkt ook zonder problemen op een enkele host. Het programma maakt gebruik van zogeheten 'raw ip packets' om actieve hosts en informatie over de beschikbare services te achterhalen. Voor meer informatie over de mogelijkheden verwijzen we jullie door naar deze pagina. De ontwikkelaars hebben weer een nieuwe versie uitgebracht met ditmaal 4.68 als het versienummer. De aankondiging op de mailinglijst ziet er als volgt uit:
Hi All. I'm happy to report that there have been several stable Nmap releases since I mailed you about Nmap 4.60 in March. The latest version is 4.68, and I think you'll like it (unless you still use Win2K, which can be problematic due to IPv6 issues that we hope to resolve in the next release). Before I give you the full list of 125 improvements, I'll start with a few highlights:
Please give it a try! And if you encounter any problems, report them to nmap-dev as described at http://nmap.org/book/man-bugs.html.
- Added a new --min-rate option that allows specifying a minimum rate at which to send packets. This allows you to override Nmap's congestion control algorithms and request that Nmap try to keep at least the rate you specify. The rate is given in packets per second. Read more in the Nmap man page (http://nmap.org/book/man-performance.html). If you use the latest version in the Nmap subversion repository, you'll also get a --max-rate option which lets you limit Nmap's packet rate (and thus bandwidth used).
- Mac OS X binary packages for Zenmap+Nmap are now available, as I mentioned in the previous mail.
- The Windows version of Nmap now supports OpenSSL just as the UNIX versions have for years. Both the .zip and executable installer binary packages we ship from the Nmap download page now include OpenSSL.
- We now compile in IPv6 support on Windows. In order to use this, you need to have IPv6 set up. It is installed by default on Vista, but must be downloaded from Microsoft for XP. This feature causes Nmap to no longer work on Windows 2000, but we hope to fix that in the next release.
- Tons of new version detection signatures and OS detection fingerprints have been added. Version 4.68 has reached more than 5,000 version detection signatures, and the latest subversion version of Nmap has more than 1,500 2nd generation OS detection fingerprints. We were only able to do this because so many of you submit updates and corrections when Nmap guesses wrong or provides a fingerprint and URL for submission on our site. Please keep those submissions coming! We receive far more fingerprint submissions than correction notices -- please do remember to submit a correction when Nmap guesses wrong, as described at http://nmap.org/submit/ .
- Nmap now supports 64-bit versions of Windows.
- We added advanced search functionality (and dozens of other improvements) to the Zenamp GUI. You can now locate previous scans using criteria such as which ports were open, keywords in the target names, OS detection results. etc. Try it out with Ctrl-F or "Tools->Search Scan Results"
- Fixed an integer overflow which prevented a target specification of "*.*.*.*" from working. Support for the CIDR /0 is now also available for those times you wish to scan the entire Internet.
- Made many performance enhancements, and also fixed many errors which could lead to crashes in Nmap or Zenmap.