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Dovecot multiple auth login failures from same IP

Discussion in 'E-mail Discussions' started by ryanicle, Dec 1, 2017.

  1. ryanicle

    ryanicle Registered

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    Hi,

    In my VPS with WHM version 66.0.23 installed, I see several hundreds of dovecot auth login failures from the same IP (not ours). This is requesting dovecot auth in every 2-3 seconds in /var/log/maillog. Is there a way that I could stop with WHM bult-in Brute Force protection?

    27162 rip=37.49.227.236

    With several requests from the same IP, it will exceed Maximum Number of Authentication Processes in Dovecot, resulting in prompting passwords for our users in Outlook.

    Note: my provider says that our IP is getting blocked. I believe this is the case. It is something related to Maximum Number of Authentication Processes.

    Could anyone shed some lights? Your help is greatly appreciated!
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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