RHCSS Training-Securing Linux Servers using Port Knocking

Red Hat Training video by Network NUTS. Beyond RHCSS level skills. Explains the importance of port knocking in Linux. How port knocking provides additional layer of security to Linux servers. How to restrict all secure connections using IPTables and then allowing only legitimate users open the port or service by first identifying themselves with a specific sequence of port knocking, using knockd daemon.
Goes much beyond RHCE Training or RHCSS Training curriculum.
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