Re: Dictionary attacks

[Allen Coates]

On 03/11/2019 02:42, Wietse Venema wrote:
> John Schmerold:
>> What is the best way to protect against dictionary attacks in Postfix?
>  
> Reportedly, fail2ban (no first-hand experience, because I have no
> SASL clients).
> 
>       Wietse
> 

I run a home-brewed fail2ban look-alike; I find it almost as useful as 
postscreen.

Another mailling list suggests an ACL based on IP netblocks, to define a
"service area" where incoming AUTH connections are permitted.

Allen C