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  • Unix: Why you should love nmap

    Posted June 4, 2014 - 2:50 pm

    Discovering hosts and services isn't just something that hackers do. A good sysadmin needs to work with an up-to-date view of the systems they manage or those they want to keep an eye on.
  • Slideshow

    Sher-locked: 12 famous passwords used through the ages

    Posted January 8, 2014 - 3:34 pm

    Passwords seem like a recent thing, but they’ve been in use for a long time. Here are a dozen of the more memorable ones
  • Unix How To: Using nmap to Map Your Network

    Posted February 17, 2010 - 2:20 pm

    It is certainly well known that "hacker tools" can be used for many legitimate purposes. Nmap, the Network Mapper and security scanner is no exception. These days, it is used routinely to identify the operating systems, applications and software versions running on targeted systems.
  • Unix Tip: Finding services on a subnet

    Posted May 14, 2007 - 12:23 pm

    If you have ever needed to survey a large group of systems to find out which of them supported some particular service, such as ftp, telnet, ssh or some other particular application, you have probably thought of numerous ways to query the systems for the required information and display it in some usable fashion. Many methods of obtaining information from servers, however, require some sort of login or a remote shell request that either takes more time than you want to spend or requires you to configure some sort of trust on the part of the systems with the information for the system on which it is being collected. In today's column, we will look at a way to find out about services running on systems without setting up any access ahead of time.

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