Re: [exim] smtp flood defense

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Author: Matt
Date:  
To: Exim Mailing List
Subject: Re: [exim] smtp flood defense
> smtp_accept_max = 50
> smtp_accept_max_per_connection = 12
> smtp_accept_max_per_host = 4
> smtp_connect_backlog = 20
>
> and ipfw
>
> add allow tcp from any to me smtp limit src-addr 1 setup
> add deny tcp from any to me smtp
>
> are there other more current tricks of the trade i am missing?

Try this: 

warn ratelimit = 200 / 1h / per_rcpt / strict
        delay = 10s
        log_message = Sender $sender_address rate $sender_rate /
$sender_rate_period excedes limit delayed 10 seconds


Matt

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