[gentoo-server] Failover-capable DNS server?

[Pandu Poluan <pandu@poluan.info>]

Hello all, I'm in need of some suggestions.

You see, I have 2 Internet connections with public IP addresses, let's
say ISP A 11.22.33.44 and ISP B 22.33.44.66

Now, I want outside parties trying to connect to "target.example.com"
by default resolves to 11.22.33.44, but if ISP A's connection goes
down for any reason, the DNS server will instead return "22.33.44.66".

The nameserver itself will be located in the company, accessible from
the world via "ns1.example.com" = 11.22.33.44:53 or "ns2.example.com"
= 22.33.44.66:53. This allows the nameserver to monitor the state of
the connections to ISP A and ISP B.

I've been perusing pages discussing BIND, and came to the conclusion
that BIND is incapable of doing that.

Anyone can recommend me a DNS server that has such capability? Or how
to implement this ability with maybe Python or (*shivers*) Perl?

Rgds,
-- 
FdS Pandu E Poluan
~ IT Optimizer ~

 • LOPSA Member #15248
 • Blog : http://pepoluan.tumblr.com
 • Linked-In : http://id.linkedin.com/in/pepoluan