"Dan Mahoney, System Admin" wrote: > Three firewall rules I think nobody should live without: > > 1) ipfw add 500 allow tcp from any to me 25 limit src-addr 2 setup > > Yup, you read that right. Limits tcp connections to no more than two > per connecting address. You could probably even drop that to one.
A nice thought, but absolutely useless in the case where you receive any volume of mail from a host running qmail. :( qmail, in case you don't know already, does not serialize mail delivery by reusing a single connection (like just about every other MTA in existence). One message == one recipient == one connection. >:( -kgd -- Get your mouse off of there! You don't know where that email has been!
