SASL Authentication Failure

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Junior Member
Posts: 6
Joined: 16 Jul 2017, 20:26

SASL Authentication Failure

Post by mikey_189763 »

Hey guys,

It seems my server is getting a lot of failed SASL auth attempts via the maillog lately. This doesn't seem to be part of CSF's default configuration, so a lot of bad attempts got through!

I added a custom rule for LFD to ban these "bad SASL" people, but I highly suggest you make it part of the default csf.conf

Here is the tutorial I followed to implement the custom rules on my own server: ... -on-centos
Posts: 1480
Joined: 01 Oct 2008, 09:24

Re: SASL Authentication Failure

Post by ForumAdmin »

These are already detected, but you need to ensure that you have set SMTPAUTH_LOG to the log file where they are logged. In your case: /var/log/maillog and then restart csf and then lfd.
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