Sandy Drobic wrote:
Jim Flanagan wrote:
/etc/postfix/client_blacklist: 1.2.3.4 554 rejected host due to amount of spam!
This example does not work if the sending client is in $mynetworks. Execute "postmap hash:/etc/postfix/client_blacklist" each time you edit the source file /etc/postfix/client_blacklist. Execute "postfix reload" each time you edit main.cf or master.cf.
I did as you indicated above, and that seems to be working fine. Would it also be correct to reject a block of IP numbers in the format of 1.2.3.4-5.6.7.8?? It this correct?
No, you can't do that in Postfix. Postfix can handle ip address ranges only in certain ways.
hash: Hash tables can only match the whole string regexp/pcre: Lots of ways to match string parts, but not ip specific cidr Match against address classes in cidr notation
So either use a pcre map like: /1\.2\.3/ 554 blacklisted ip range
or use a cidr map like: 1.2.3.0/24 554 blacklisted ip range
With a cidr map you need to describe the address ranges in cidr notation, in neccessary, break down the desired ip range into several cidr notations.
Sandy
Thanks Sandy, Will read up on IP nomenclature and proceed with this. Many thanks for the great help. Jim F