cache dead records

[Todd Snyder]

Look at something like an F5 GTM ... it can do health checks on pools
and respond with only available/geographically close/etc ips... 

http://www.f5.com/products/big-ip/product-modules/global-traffic-manager
.html

More than likely far too big for what you're looking for, but service
availability checking isn't really what BIND is used for.

If you wanted to do it on the cheap, you could write a script that would
check for service on the IP for a domain, and if it doesn't answer,
updates the zone to remove/change the record. 

Todd.

-----Original Message-----
From: bind-users-bounces at lists.isc.org
[mailto:bind-users-bounces at lists.isc.org] On Behalf Of netfox at royal.net
Sent: Thursday, October 22, 2009 11:45 PM
To: bind-users at lists.isc.org
Subject: cache dead records

Hello,

We are using bind9 for DNS Cache.
What the problem is, sometime the IP address for a domain is dead, but 
Bind won't know, and still responds the dead IP to clients, after that 
clients access the sites failed.
So is there a way to do health check for destination IPs before 
responding the DNS answers?

Thanks.
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