[NBLUG/talk] Redundant DNS
gandalf at sonic.net
Wed Mar 10 11:25:01 PST 2004
Here's the potential situation. I have a web server with two different
routed internet connections. The IPs are X.X.X.X and Y.Y.Y.Y. I want
people on the internet to reach my web server regardless of which
connection is up or down. I know I can put something like:
web.me.com IN A X.X.X.X
IN A Y.Y.Y.Y
in the Zone file and it will round robin between the two address, somewhat
ballancing the load, but what if the X.X.X.X connection goes down. Won't
every other request fail?
I have the O'Reilly DNS and BIND book 4ed but haven't found a reference to
how to set this up. The connections are both broadband and feature static
I'd also like to possibly have a third address Z.Z.Z.Z, but it would be a
dynamic address (although I've heard that dynamic DNS is possible) and a
slow 56k connection and should not be used unless both X.X.X.X and Y.Y.Y.Y
Does anyone know what I'm talking about? Anyone set up something like
this? I have basic access to the Zone file, but I can't configure the DNS
If this sort of thing is possible can I also tune the connections so that
say 70% of the queries return one path and 30% return the other?
Are you all sick of my questions?
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