[SATLUG] Question about proper DNS setup

[Sean Carolan]

I have encountered the following situation with a client.  The names
are changed to protect the innocent.

Server A is a Linux DNS server running BIND, which is a master name
server for the zone "example.com".  This is an internet-facing server
that allows public queries for example.com hosts.

Server B is a second DNS server behind a corporate firewall which is
running Windows 2000 DNS server.  This one is *also* a master for the
example.com domain.  The problem is there is no automatic syncing
between the two nameservers, and moreover the corporate Windows box
serves up a mix of *internal* and external IP addresses, some of them
different than what's on Server A.

You can connect to hostname.example.com at work and be on a completely
different server when you go home and connect to hostname.example.com
from outside the firewall.  I guess the previous admin was too lazy to
set up dev.example.com, testing.example.com, etc.

Are there any RFCs or guidelines with more info on this situation?
Personally I don't think we need two separate DNS servers for the same
domain name if they are not synced up properly.