Andreas Pettersson wrote:
> Matt wrote:
>> How many block connections with no reverse DNS? How much collateral
>> damage is there with doing that? How do you set it up in Exim?
>>
>
> We block connections with missing rDNS but only from a specified list of
> countries:
> AR, BG, BR, BY, CL, CN, CZ, ES, FR, ID, IN, IT, KR, LV, MX, MY, PE, PH,
> PL, RO, RU, TR, VN
>
> The reject message clearly says what's wrong, and so far I haven't had
> any issues that I'm aware of.
>
> The setup:
>
> deny !verify = reverse_host_lookup
> dnslists = countries.blackholes.us=\
> 127.0.3.2,\
> 127.1.0.0,\
> 127.0.7.6,\
> ...
> message = your message goes here..
I am finding little info on countries.blackholes.us. Their website doesn't offer what
exactly they provide.
What mechanism in the example above blocks those specific countries listed at the top?
I'd like to use this if I could understand it better.
thanks!
