While no security is fool proof, it is important that we do as much as we can to ensure maximum protection on our netowrk devices like Routers and Switches. Cisco IOS has enhanced Login restriction features which can control login attempts to it. This includes time delay between failed login attempts, block period after a set of failed login attempts and audit logs of successful and failed login attempts.
These login restrictions provides more control and make it that more harder for unauthorised accesses and prevent against Dictionary based DoS attacks.
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