ABM improves the blocking features of phpBB. Features:
Adds multiple DNS Blacklists for the phpBB dnsbl_check (Check IP against DNS Blackhole List).
Adds a weight system with a threshold value to dnsbl_check. So if configured the IP address have to been listed on several DNSBLs before it will be blocked. So you can reduce the number of false positives to Zero.
Adds timezone check (UTC -12 trick) for blocking.
Adds Block log for all block actions (DNS MX, DNSBL, TZ). For every block type it can be enabled or disabled.
Technical background information:
dnsbl_check is included in phpBB3 Olympus by default. But it is using the spamhaus.org DNSBL. This list creates a lot of false positives. There are other DNSBLs - e.g. dnsbl.tornevall.org - which are more recommended for the prevention of board spam registrations and spam posts.
The UTC-12 trick is blocking spam bot registrations very succesfully. Still a lot of these programs are using the first or the last entry of the timezone dropdown menue. And here the MOD is catching them.
