Re: [exim] Help with AUTH DDOS

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Autor: Jeremy Harris
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Dla: exim-users
Temat: Re: [exim] Help with AUTH DDOS
On 24/06/2019 19:35, mixed8e--- via Exim-users wrote:
> What would be the Exim setting to limit the number of TCP connections? Or
> is it a bad idea to limit connections like that? I do know at least one
> group of users of this server sit behind a single IP address, so the
> connection count for that IP address is very high. Does that mean I can't
> approach the problem from this angle? (short of whitelisting known
> addresses)


There's several different ways of limiting load. You'll need to
read the docs.

For basics, smtp_accept_max, smtp_accept_max_per_host,
smtp_reserve_hosts.

http://exim.org/exim-html-current/doc/html/spec_html/ch-main_configuration.html#SECTalomo

--
Cheers,
Jeremy