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Open Source Security Tools : Practical Guide to Security Applications part 13

Open Source Security Tools : Practical Guide to Security Applications part 13. Few frontline system administrators can afford to spend all day worrying about security. But in this age of widespread virus infections, worms, and digital attacks, no one can afford to neglect network defenses. Written with the harried IT manager in mind, Open Source Security Tools is a practical, hands-on introduction to open source security tools. | Howlett_CH04.fm Page 99 Tuesday June 29 2004 3 10 PM Uses for Port Scanners 99 malicious code in the programs. You will need to run this set of commands for each source file the main Nmap program and the Nmap front-end program unless you only intend to use it via the command line . 2. Once you have either run the RPM or compiled the program you are ready to using Nmap. Start the graphical client by typing nmapfe If you don t have usr local bin in your PATH statement type s usr local bin nmapfe. The main interface screen will display see Figure 4.1 . Tip You can also create a link to the binary on your desktop so you can just double-click on it to start the program. Installing Nmap for Windows Nmap for Windows is maintained by Jens Vogt. He has ported it to the Windows OS and has done an admirable job of keeping up with the UNIX releases although it is a version behind as off this writing version 3.0 and is considered to be in beta format what open source project isn t . It isn t quite as fast as the UNIX version but it has the same major features. Figure 4.1 Nmap Graphical Interface Howlett_CH04.fm Page 100 Wednesday June 23 2004 10 24 PM 100 Chapter 4 Port Scanners 1. Get the file from the CD-ROM that comes with this book or download the simple executable setup file for NMapWin from http download.insecure.org nmap dist nmapwin_1.3.1.exe 2. You will need to install the WinPcap executable if you don t already have this driver loaded. If you aren t sure then you probably don t have it since it is not a standard item included with any version of Windows. The WinPcap libraries allow Nmap to have lower-level access to your network card so it can capture unaltered packets in a standard cross-platform fashion. Fortunately the NmaPWin install package provides these files. The WinPcap install file is in files nmapwin winpcap. There are two versions of WinPcap. It is preferable to run the newer version WinPcap 3.1Beta. If you are running a multiple processor system you must