Links
Angry IP Scanner ( http://www.angryziber.com )
Angry IP scanner is a very fast IP scanner and port scanner. It can scan IP addresses in any range as well as any ports. Its binary file size is very small compared to other IP or port scanners. Angry IP scanner simply pings each IP address to check if it's alive. Optionally, it can resolve its hostname, determines the MAC address, scans ports, etc.
Barracuda Central ( www.barracudacentral.org )
This website is devoted to sharing information with Barracuda Networks customers and the Internet security community. Here you will find a wide range of statistics, threat information, and a number of useful services to help manage and secure your network. Information provided is more technical in nature, and geared toward IT and system administrators.
CERT ( www.cert.org )
The CERTŪ Program is part of the Software Engineering Institute (SEI), a federally funded research and development center at Carnegie Mellon University in Pittsburgh, Pennsylvania. Following the Morris worm incident, which brought 10 percent of internet systems to a halt in November 1988, the Defense Advanced Research Projects Agency (DARPA) charged the SEI with setting up a center to coordinate communication among experts during security emergencies and to help prevent future incidents. This center was named the CERT Coordination Center (CERT/CC).
Dynamips Router Emulator ( www.dynagen.org )
Dynamips is a free Cisco router emulator. It will run IOS images from several models of Cisco routers, and is useful for testing or lab exercises.
nTop-XTRA ( www.ntop.org )
nTop is a high quality open source flow analysis tool released under the GNU General Public License. nTop-XTRA is a package that includes everything you need to get it up and running on a Windows machine in just a few minutes.
Project Honeypot ( www.securitywizardry.com )
Founded in 1999, The Honeypot Project is an international, non-profit (501c3) research organization dedicated to improving the security of the Internet at no cost to the public. With Chapters around the world, our volunteers are firmly committed to the ideals of OpenSource. Our goal, simply put, is to make a difference.
Pumpkin TFTP Server ( kin.klever.net/pumpkin )
PumpKIN is an open source, fully functional, free TFTP server and TFTP client.
SANS Internet Storm Center ( isc.sans.org )
The ISC was created in 2001 following the successful detection, analysis, and widespread warning of the Li0n worm. Today, the ISC provides a free analysis and warning service to thousands of Internet users and organizations, and is actively working with Internet Service Providers to fight back against the most malicious attackers.
Secure Password Generator ( www.pctools.com/guides/password )
Looking for a tool to create secure passwords? This web site gives you several different options so you can control the types of characters used. Very good site.
SolarWinds Software Downloads ( www.solarwinds.com/downloads/index.aspx )
SolarWinds solutions are designed by network engineers, for network engineers. This link will take you to a page that allows you to download their products plus all their free tools including a TFTP Server and Subnet Calculator.
SpeedTest.net ( www.speedtest.net )
Looking for a bandwidth speed test with a really cool interface? Check out this link!
TeraTerm 3.1 ( www.ayera.com/teraterm )
TeraTerm Pro Web is the next generation tool for connecting with remote Telnet and SSH hosts. It is built based on the extremely popular open-source TeraTerm product put out by T. Teranishi in 1999.
WhatsUp Gold ( www.whatsupgold.com )
Want to monitor your router interfaces or server performance? WhatsUp has been doing it for years.
Wireshark ( www.wireshark.org )
The essential tool for all network professionals for fault finding and troubleshooting. Fully featured protocol analyzer offering packet capture, decoding and analysis. This version is packaged with PCAP and can be installed and functional in minutes.