German Molano & Asociados wrote:
Hi there, My question is... there is any setting to limit incoming
conections to smtp per IP basis? or smtp connections per IP/hour
basis? is that posible ?
thanks for your help
You can limit the total number of SMTP connections by adjusting
concurrencyremote (details on the wiki).
As for limiting per IP, that can easily be done through the firewall.
This, for example, will limit an IP to no more than 10 connections in a
60 second timeframe:
-A INPUT -i eth0 -p tcp -m tcp --dport 25 -m state --state NEW -m recent
--update --seconds 60 --hitcount 10 --name DEFAULT --rsource -j DROP
-A INPUT -i eth0 -p tcp -m tcp --dport 25 -m state --state NEW -m recent
--set --name DEFAULT --rsource
