
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Can you create a port knocking system only with iptable commands that will open up port 22 (SSH) when the remote host “knocks” on ports 2222, 3333, 4444 within 30 seconds?
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