My Corporate Mail server(housed at HQ) is accessible to my zonal office(geographically located in a different state) via a point-to-point leased line on a LAN IP address say 192.168.1.100.
Additionally, it is also accessible via the web by a FQDN say www.mail.example.com
- In the Zonal Office I have setup a Bind name-server. In its configuration I have made a zone for www.mail.example.com to translate to the LAN-IP address i.e. 192.168.1.100, in order to save on the internet bandwidth while accessing the mail.
Now the problem I am facing is that the leased-line goes down once in a while and Although the mail-server is accessible via web and also In my bind configuration I have made Google's DNS 184.108.40.206 as forwarder, users when type www.mail.ecil.co.in they get redirected to 192.168.1.100.
Is there a way I can tell bind, if the IP address for this FQDN can't be reached, try to resolve it's domain-name via 220.127.116.11.