On Wed, 2009-07-08 at 17:26 -0600, Mario Guerra wrote: Bad idea. If nothing else - offer a "Secondary DNS Service" to those that need it. At my ISP, I have developed a "Secondary DNS System", Linux, Apache, Mysql, Php based. Users have their own logins and can define their "Primary/Master" Nameservers - then simply add domains. Because the Primary is pre-defined - I optionally allow for T-SIG transactions (Secure zone transfer). Its also IPv6 enabled. It functions in two parts - one to do all the web stuff (can run on any LAMP system) and then you can have multiple secondary name-servers that poll the Database to configure themselves. The system includes a bit of billing too. ie - What I'm saying is that its not too difficult to set up - then you can enforce the "two authoritative name-servers" rule. Its not open-source but once you have the idea - not difficult to do. -- . . ___. .__ Posix Systems - Sth Africa. e.164 VOIP ready /| /| / /__ mje(a)posix.co.za - Mark J Elkins, Cisco CCIE / |/ |ARK \_/ /__ LKINS Tel: +27 12 807 0590 Cell: +27 82 601 0496