Shields Up! is a free online Internet Vulnerability Profiling tool on the http://www.grc.com/ website.
Month: September 2007
ping – most commonly used IP connectivity troubleshooting tool
Ping (Packet Internet Grouper[groper] or Packet Inter-Network Groper) is a network utility used to check the IP connectivity between the host computer or device to a destination device. This can almost be said of as the starting point any network troubleshooting.
Nipper – Network device Security Audit tool
Nipper is an Opensource tool for network device congiguration and security audit. Nipper performs security audits of network device configuration files. The report produced by Nipper includes; detailed security-related issues with recommendations, a configuration report and various appendices. (more…)
Speed and Duplex issues when connecting to Cisco switches
Speed determination issues can result in no connectivity. However, issues with autonegotiation of duplex generally do not result in link establishment issues. Instead, autonegotiation issues mainly result in performance-related issues. The most common problems with NIC issues deal with speed and duplex configuration. (more…)
TCP/IP Filtering in Windows
Windows XP Professional, Windows 2003 and Windows 2000 supports TCP/IP filtering. TCP/IP filtering allows you to specify exactly which types of incoming IP traffic are processed as the destination for each IP interface. This feature is designed to isolate the traffic being processed by Internet and intranet clients in the absence of other TCP/IP filtering provided by IPSec, the Routing and Remote Access service, or other TCP/IP applications or services. TCP/IP filtering is disabled by default. (more…)
winsockfix – a great tcp/ip connection fixer for Windows3
In my years of experience, if I have to put a list of great tools for troubleshooting, winsockfix will certainly be one of those right at the top of it. Winsocfix fixes the winsock settings on your Windows XP machine. It can often cure the problem of lost connections after the removal of Adware components or improper uninstall of firewall applications or other tools that modify the XP network and Winsock settings. (more…)