Link: SSH Dictionary Attack Prevention with iptables

…I found it is also ideal to slow down the attack when the infested host started to brute force the SSH authentication. There are many scripts/user-land daemons that perform monitoring and blocking. However in a resource limited VPS, I prefer to use something that has less demand in memory/CPU usage. IPTables recent module provides a kernel level solution with little overhead.

Full article here:
SSH Dictionary Attack Prevention with iptables (HostingFu)

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