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Enhance Security with Port Knocking |
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Source: Linux Magazine - Posted by Bill Keys
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In the field of IT systems security, concept of” port knocking” is relatively new. However with the passage of time, it is getting popular day by day among system and security administrators.
Port knocking is a method of externally opening ports on a firewall by generating a connection attempt on a set of pre-specified closed ports. Once a correct sequence of connection attempts is received, the firewall rules are dynamically modified to allow the host which sent the connection attempts to connect over specified port (s).
Checkout this article about port knocking. It's any important security practice that every system administrator should know about.
Read this full article at Linux Magazine
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