The idea of using file integrity monitoring to validate your operating system and applications has been around since the late ’90s, with programs like Tripwire. Today, we have a steady stream of companies offering their own version for FIM. However, one consistent and reliable open source solution for Linux is AIDE or the Advanced Intrusion Detection Environment.
Continue reading AIDE – File Integrity Monitoring
Is it possible to get someone’s password in plaintext over ssh? Yes! Surely, this makes no sense when the purpose of ssh is to prevent such a thing. Well, I’m speaking of monitoring the session directly from the server the user is connecting to and not across the network.
Continue reading Sniffing SSH PasswordsAlthough we have seen examples of how to install gpg for Windows and integrate with Outlook, this class lab is designed to get gpg working in Linux with the Evolution email client.
# gpg --gen-key
Please select what kind of key you want:
(1) RSA and RSA (default)
(2) DSA and Elgamal
(3) DSA (sign only)
(4) RSA (sign only)
Your selection? 1
What keysize do you want? (4096) Continue reading GPG Lab 
The Network Logician 