Watchmouse runs a free service call Just Ping. It allows you to run ICMP echos to an IP address of your choice from 50 nodes around the world. It is quick and easy way to test basic connectivity to any IP note on the Internet. The tool also supports IPv6, although the number of test [...]

If you are thinking about using IPv6 ULA, here two sites that can generate random ULA Prefix for you. 1) SimpleDNS2) SixXS

NIST has released  SP 800-125 – The Guide to Security for Full Visualization Technologies. It is a 35 page long document. The document focuses on virtualized servers and desktop. While there is nothing we do not know already, this publication is a good summary for the current servers virtualization technologies, deployments and security recommendations.

Cisco ASA 8.3 introduces the most drastic change on NAT configuration syntax for ASA. The following page is very helpful to understand the new syntax. ASA Pre-8.3 to 8.3 NAT configuration examples – Cisco Support Community

GNS3 is an incredible easy to install network simulator. It uses Dynimips, Dynagen and Qemu to emulate network devices. You can run Cisco IOS, Cisco ASA, Cisco IPS, Juniper Junos and other network devices using GNS3. It is a great learning, development, testing tools for network engineers. GNS3 runs on Windows, MAC OSX and Linux.