Asterisk: The Definitive Guide
Jim Van Meggelen & Russell Bryant & Leif Madsen
Kali Linux: библия пентестера
Хаваджа Гас
SSH Mastery: OpenSSH, PuTTY, Tunnels and Keys
Michael W Lucas
Linux iptables Pocket Reference
Gregor N. Purdy
The Cybersecurity Self-Help Guide
ARUN. SONI