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Dovecot multiple auth login failures from same IP

Discussion in 'E-mail Discussion' 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 Technical Support Community Manager
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