Author: Jeremy Harris Date: To: exim users Subject: Re: [exim] Ratelimit Tricks
Marc Perkel wrote: > OK - we touched on this earlier but want to see if I can actually make
> it work. What I want to do is use ratelimit to limit IP addresses so
> that if I get several invalid users (dictionary attack) that the IP
> address of the attacker get a defer until some time passes. I'm thinking
> that one bad recitient gets you defered for 10 minutes.
On an invalid user, write the IP to a file. Rotate files from cron
every five minutes. In your connect acl lookup the IP in the two most
recent files.
