have a look at resolv.conf

Here's one of mine from ClearOS 7.x - they are all similar
[code]
domain sraellis.com
search sraellis.com
nameserver 127.0.0.1
nameserver 192.168.1.17
nameserver 192.168.2.35
nameserver 1.1.1.1
[/quote]
Don't use dnsmasq as it lacks vital function. nor the ClearOS modifications. Use bind and ISC dhcpd instead. Require a master/slave dns/dhcp setup to provide the ability to take down one server and not loose dns/dhcp. Full synchronisation so only the master needs updates. Multiwan provides an alternate gateway, imapsync provides mail backup and redundancy while rsync copies share data. This is the function (though not the identical software) enjoyed at work before retirement. Something that any business where availabilty is important would mandate as a minimum.

It is not possible to release an updated app-network because there is too much work-in-progress to back it out and I don't understand the reasoning behind the code that is already there. It has not changed got 6 to 7 years.

ClearOS certainly digs itself into some holes...