testssl.sh is a free command line tool which checks a server's service on any port for the support of TLS/SSL ciphers, protocols as well as recent cryptographic flaws and more.
An Illustrated Guide to IPsec
The Analysis Console for Intrusion Databases (ACID) is a PHP-based analysis engine to search and process a database of security events generated by various IDSes, firewalls, and network monitoring tools.
Azureus mit Anonymisierungsprotokoll I2P benutzen
It is a penetration testing tool that focuses on the web browser.
Neben aktuellen security threats gibt es auch aktuelle siganturen für IDS und Konsorten.
Was macht TrueCrypt eigentlich genau
Browser bugs, tricks, and hacks