Translations:Security/39/en

DNS Blacklists
UnrealIRCd has an option where each client that connects to your server is checked against an external DNS Blacklist. The example configuration file includes multiple blacklist { } blocks. We recommend you use them. The default ones are DroneBL and EFnetRBL. By using these two blacklists, you can benefit from the list of IP addresses that are known to cause problems on IRC servers.