See http://www.corpit.ru/mjt/rbldnsd.html for description. Older text follows. I need to figure out how to organize all my www stuff... ;) Here you'll find a tiny DNS daemon, rbldnsd, which is designed especially to serve DNS-based blocklists such as relays.osirusoft.com, dsbl.org, ordb.org, rfc-ignorant.org and many others. This is extremly fast daemon - it outperforms both bind and DJBDNS greatly. It has very small memory footprint. Currently (2002-11), machine as small as i486-100 with 32Mb memory can be DNS server for all zones of relays.osirusoft.com just fine. Compare this with requiriments for bind - 256Mb memory and 400MHz PPro or higher machine. On PII-233 machine and with relays.osirusoft.com zones, it performs as many as 3500 requests per secound - limited by machine's networking support only, requires less than 2.5Mb memory to operate, and takes 7 secounds to (re)load all zones. The daemon can serve both IP-based and name-based blocklists (with example of last being rfc-ignorant.org). Unlike DJB's rbldns, it has ability to specify individual values for every entry, and can serve as many zones on a single IP address as you wish. Input format is very simple and far more sutable for such a task compared to one of full-featured bind. It is released under GPL license version 2 or any later version. Enjoy. -- Michael Tokarev, mjt {at} corpit {dot} ru.