On 6/30/2017 12:05 PM, Aki Tuomi wrote:
On June 30, 2017 at 9:49 PM Daniel Miller dmiller@amfes.com wrote:
I've made a preliminary auth policy server in Perl - and it sort of works (mostly) - but I've got some questions on "proper" implementation.
Hi!
First of all, which version are you running, and can you get a bt full backtrace of the crash?
Secondly, the endpoint does not need to be a proper web server, you can compare with https://github.com/PowerDNS/weakforced which is another implementation of auth policy server.
Aki
That link helped a lot - among other things forcing me to read. I actually broke my policy server trying to "improve" it - I implemented a 30-second auth delay on valid logins! Setting that back to 0 seems to do the trick...
I running Dovecot 2.2.28. For the bt - I'll be happy to if still desired, but you'll have to give me instructions as I don't know how.
As I continue tweaking this, if there's any interest I'll see about
sharing this. For my own needs I wanted a GeoIP based policy. My
thinking, skewed as it is, is that while SMTP needs to be relatively
open - as I have friends & business contacts in other countries - the
only people who access my IMAP server are somewhere in my country.
Therefore, simply restricting login attempts to only be from IP's in my
country will block the majority of botnets (at least, that's what I
think I'm seeing from my logs).
Daniel