Network Protocol Analyzers

• 
  WiresharkGratis

  The world's foremost network protocol analyzer. 

• 
  SmartSniffGratis

  Capture TCP/IP packets on your network adapter.

• 
  Open Visual TracerouteGratis

  Open source cross-platform visual networking tool.

• 
  DNSQuerySnifferGratis

  A network sniffer utility that shows the DNS queries sent on your system.

• 
  HTTPNetworkSnifferGratis

  A packet sniffer tool that captures all HTTP requests/responses sent between the Web browser and the Web server and displays them in a simple table.

• 
  CountryTraceRouteGratis

  Displays the country of the owner of every IP address found in the Traceroute.