Re: [exim] Blocking a Class C

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Autor: The Doctor
Data:  
A: Andrew C Aitchison
CC: exim users
Assumpte: Re: [exim] Blocking a Class C
On Thu, Jan 19, 2023 at 11:57:04AM +0000, Andrew C Aitchison via Exim-users wrote:
> On Thu, 19 Jan 2023, The Doctor wrote:
>
> > On Thu, Jan 19, 2023 at 08:44:30AM +0000, Andrew C Aitchison via Exim-users wrote:
> >> On Wed, 18 Jan 2023, The Doctor via Exim-users wrote:
> >>
> >>>> On Thu, Jan 19, 2023, 00:33 The Doctor <doctor@???> wrote:
> >>>>
> >>>>> Still having problems with
> >>>>>
> >>>>> /var/log/exim/in_rejectlog:2023-01-18 14:27:01.484 [97258] refused
> >>>>> connection from [46.148.40.108]:61402 I=[204.209.81.246]:465
> >>>>> (host_reject_connection)
> >>>>>
> >>>>> THere are still coming and not being dropped in a timely manner.
> >>>>>
> >>>>> can these packets be dropped in less than 0.01 ms?
> >>>>>
> >>>>> Legit e-mail is not getting through and costumers are complaining.
> >>>
> >>>> On Thu, Jan 19, 2023 at 12:36:38AM +0300, Odhiambo Washington via Exim-users wrote:
> >>>> Block at the firewall before they reach the server.
> >>>>
> >>> Ateempted but not happening. I wonder if the IPs are being faked.
> >>
> >> I don't think faked packets would get through the firewall if you are
> >> blocking the faked IP address.
> >>
> >> The logs indicate that the attacker is connecting to port 465.
> >> Are you blocking that as well as port 25 ?
> >>
> > I cannot block port 25 if I want mail from the outside world to get it.
>
> I assumed that you were blocking the pair
>      (src ip 46.148.40.108, target port 25)
> and was checking that you are also blocking
>      (src ip 46.148.40.108, target port 465)

>


Could this cause a 601 error?

> -- 
> Andrew C. Aitchison                      Kendal, UK
>                     andrew@???

>
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