Publish all 3 NSes.
Publish MX records with primary/failover preferencing.
Use a load-balancer (free or commercial, software/hardware/cloud-based) to
direct the web traffic.
- Kevin
On Wed, Jun 5, 2019 at 11:16 AM Roberto Carna <robertocarn...@gmail.com>
wrote:
> Dear people, I have two sites:
>
> - Main site with an Internet link and two BIND services (DNS1 y DNS2) and
> a /28 block, and web and mail services supported
> - Backup site with a second Internet link and a BIND service (DNS3) and
> another /28 block
>
> When the Internet link from main site is DOWN, the web and mail traffic
> come through the backup site to main site crossing a L2L. So I need to
> change the IP's of the FQDN hosts I have supported in the DNS3 in order to
> continue offering services (web and mail). How can I do this automatically?
> Is there any way that "something" monitors the main Internet link and in
> case it is DOWN automatically order to modify the FQDN records in DNS3 ???
>
> Thanks a lot and regards!!!
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