Topic: Blacklist / Whitelist large subnets
==== Required information ====
- iRedMail version (check /etc/iredmail-release): 2.1.1
- Linux/BSD distribution name and version: CentOS 6.4
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? Yes
- Related log if you're reporting an issue:
====
I'm attempting to add a system-wide blacklist for an entire /18 subnet generating a lot of spam. I could add 172.103.%.% and block the entire third and fourth octet, but would prefer to block only the infringing 172.103.64.0/18.
Is there a way to accomplish this using wildcards without blocking an entire Class B of IPs and without adding 64 different /24 listings:
172.103.64.%
172.103.65.%
172.103.66.%
...
172.103.127.%
Adding 172.103.64.0/18 doesn't seem to work.
NetRange: 172.103.64.0 - 172.103.127.255
CIDR: 172.103.64.0/18
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