Creating and Maintaining Home Networks
Testing Devices Within Your LAN


Download the Free Nmap Security Scanner for Linux/Mac/Windows
  Nmap ("Network Mapper") is an open source tool for network
  exploration and security auditing. It was designed to
  rapidly scan large networks, although it works fine against
  single hosts. Nmap uses raw IP packets in novel ways to
  determine what hosts are available on the network, what
  services (application name and version) those hosts are
  offering, what operating systems (and OS versions) they are
  running, what type of packet filters/firewalls are in use,
  and dozens of other characteristics. While Nmap is commonly
  used for security audits, many systems and network
  administrators find it useful for routine tasks such as
  network inventory, managing service upgrade schedules, and
  monitoring host or service uptime.

Nmap Tutorial to find Network Vulnerabilities
  Since my Local Area Network (LAN) has the IP addresses I will do the following nmap scan: 
  sudo nmap -F


  Wireshark is the world's foremost and widely-used network
  protocol analyzer. It lets you see what's happening on your
  network at a microscopic level and is the de facto (and
  often de jure) standard across many commercial and
  non-profit enterprises, government agencies, and educational
  institutions. Wireshark development thrives thanks to the
  volunteer contributions of networking experts around the
  globe and is the continuation of a project started by Gerald
  Combs in 1998.