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-boun...@lists.isc.org [mailto:bind-users-boun...@lists.isc.org] On Behalf Of net...@royal.net Sent: Thursday, October 22, 2009 11:45 PM To: bind-users@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. _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users