On 2018 Aug 04 14:41:16, you wrote to Chris Costanzo:

 >> 1) Duplicate IP checking (ability to limit connections by IP)

 KH> If you want to limit connections (block extra connections from same IP),
 KH> you can configure your firewall to do that. At least Shorewall can do
that.

so what if the guy is using your web server and his mailer attempts a mail
transfer? that won't work if you block in the firewall based on IP only... it
would seem to be better for the application to reject multiple connections
from the same mailer... binkleyterm, frontdoor, binkd and other mailers
certainly do this with their busy semaphores... if the semaphore already
exists and isn't too old (if they have an option for semaphore age), they will
reject the incoming connection with something like "BUSY" or "No servers
available"...

)\/(ark

Always Mount a Scratch Monkey
Do you manage your own servers? If you are not running an IDS/IPS yer doin' it
wrong...
... 'Home, Sweet Home' must surely have been written by a bachelor.
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