Advanced Subnet Calculator from SolarWind is a simple but powerful easy to use Subnet Calculator for Windows.
Advanced Subnet Calculator can perform
whois lookups for hostnames and Domain Names
IPWhois Lookup for the provided IP Address
Classful Subnet Calculator
Claseless Inter-Domain Routing (CIDR) Calculator
Address Generator for a given IP Address and Subnet Mask
Dr.TCP is a simple but powerful utility that can let you fine tune the TCP/IP parameters for your Network Interface Card (NIC). It works on Windows XP, 2003,2000.
Dr.TCP takes the hassle out of editing the Windows Registry and modifying keys to fine tune the TCP/IP Parameters at
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\<AdapterID>]
Yersinia is a free Network Penetration testing tool used to test and analyse some of the most commonly used protocols on your network. Penetration testing tools of this kind will provide deep insight on network security issues. Yersinia is a UNIX based tool that works on Linux, Solaris 8, FreeBSD.
NOTE: The tool is described as a tool to perform network tests and exercise responsible actions when performing tests which includes obtaining the permission from responsible authorities. DO NOT USE THIS TOOL FOR ANY UNAUTHROSIED HACKING PURPOSES
One of the most important thing that is ignored most of the time while troubleshooting a network problem to a host or a network is checking the MTU related issue. This makes more sense in situations like troubleshooting VPN related issues.
MTUROUTE is a small but smart utility that uses ICMP pings of various sizes in order to determine the MTU values (Maximum Transmission Unit) on the path between itself and the target system. MTUROUTE can operate in normal mode where it sends multiple ICMP packets to each hop on the path to identify the smallest MTU between the host and hop or in a Traceroute mode where it will attempt to determine the lowest MTU between the local host and each hop in the communication.
It is important to note that care has to be taken as it generates muti fold ICMP traffic as it tries to determine the MTU Values.
Packet Trap pt360 Tool suite is a Windows based free Network Diagnostic tools suite and a Network Monitoring tool. Packet Trap has a nice Dashboard with drag and drop dashboard components.
At the first look, Packet Trap is very impressive, simple, easy to use, easy to understand, simple and easy navigation and menu options. All the diagnostic tools are graphic and provides a great advantage as a one stop shop for most of the Network troubleshooting. What is even more impressive is that the monitoring system being integrated into a Network Diagnostic suite which allows an admin to monitor and troubleshoot all from one place and they all can export the results in nice HTML format.
ARPing is an utility that can be used to ping using ARP requests instead of using ICMP as used in standard Ping utility.
Because it involves ARP, arping is limited to the local network to which the server or the interface (if more than one interface) is connected to. ARPing can be quite useful to