See what source IP address your outbound connections are coming from along with a wealth of other information sent by your browser
An explanation of the many and various uses and interpretations of the TOS field in the IP header
Limits for various flavours of Ethernet (and ATM) and types of fibre
An amusing analysis of exactly how large the IPv6 address space really is and how it is allocated
An explanation of how IP and Ethernet multicast addresses are related. Includes a converter tool to convert between them (if you couldn't be bothered reading the explanation !!)
A Windows tool for testing IP multicast in your network
Quick-reference sheet of useful OpenSSL recipies for converting X.509 digital certificates between different formats
A Java applet for decoding X.509 digital certificates and displaying their contents
A short explanation of how to determine which process on your PIX is gone nuts and a Perl script to make it easier to do
Brief instructions for cloning a Linux machine from backups taken using the standard dump utility
Some configuration information about new IPSec VPN features in PIX/ASA version 7. In particular, this document shows how to configure per-group ACLs (without having to using the ACL on the outside interface)
This only works for "type 7" passwords. "Type 5" password can't be decrypted. The decryption is done in your browser. The password isn't transmitted anywhere.