Re: [exim] Preventing exim DoS attacks

On 2015-06-09, soumya tr <soumya.324@???> wrote:
> Hi,
>
> Any one have tips on preventing DoS attacks on port 25?

It's basically impossible to prevent the attack, unless youre prepared
to unplug the network: You have to harden the target instead:

Optimise the email rejection path. Install a dns cache. Teergrube.
If it's a distributed DoS consider an adaptive firewall like fail2ban.


port 25 is a big target, abd exim is highly configurable.
many attacks need attention on a case by case basis.


--
umop apisdn