CCIE or Null!

My journey to CCIE!

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  1. I see a lot of interesting posts on your website.
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    July 16, 2014 at 6:52 PM

  2. So what would be the end effect of a person brute forcing your router or switch login? What this effectively prevent any logins. So, for example, as I brute force attempt to discover the password, I’ll get locked out for 120 seconds and then my script will continue to run. After 120 seconds and then the next five failed, I would get locked out again? Would this not effectively render the switch or router in a lockout loop of sorts so not even legitimate users could login? Or, as long as I log in from a different host, I’m okay since it logs the source IP address. I may have just answered my own question.

    B Drew

    May 1, 2017 at 11:16 PM

    • Correct, as long you specify an access list for the ‘quiet mode’ configuration and attempt to connect from that configured network, you still have access to the router. While anyone not allowed in the quiet mode ACL will continue to be denied.

      This just designed to be a deterrent, since it can cannot stop the attack from continuing. This can however alert you to the incident with additional logging and alerting on your syslog server. This can provide valuable time to investigate the issue.

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