The TCP/IP Settings window calls this the Primary Suffix.If a query using the primary suffix fails, and the Append Parent Suffixes option is checked, the resolver strips the leftmost element from the primary suffix and tries again. The TCP/IP settings for each network interface can have a unique DNS suffix, populated either statically or with DHCP.This agreement would allow your DNS server to send recursive queries to the ISP’s name servers.Otherwise, you can put a caching-only server in your perimeter network to use as a forwarder.This standard query resolution has a couple of problems.First, the internal server can get so preoccupied chasing down recursive queries for public hosts that it runs out of resources to handle queries for its own zones.Worse still, the internal server must reach through the firewall and connect to a variety of DNS servers, some of which could have traps that play malicious games with DNS requests.An internal root server doesn’t need to waste energy or cause security problems by chasing referrals.
But even the most highly trained and savvy administrator can get in a hurry and make a mistake.
If you elect to use the entries in a search list, the resolver ignores the primary suffix, its parents, and the connection-specific suffix.
In the default suffix search configuration, a client in the west.school. If you want a flat name to resolve to the host’s actual FQDN regardless of the host’s domain, select the Append These DNS Suffixes option and list each domain in the order you want them tested.
I liken it to the days when automobiles had carburetors; a mechanic could fix most engine performance problems by fiddling with the choke—spritz a little WD-40 into the throttle body, charge and retire in the suburbs after a few years. Check the TCP/IP settings, run a few utilities to verify the zone records, charge 0 (correcting for inflation) and retire to Arizona.
You’ll learn to identify the most common domain name system issues that cause problems for AD and Exchange and how to avoid them in the first place or isolate and resolve them if they occur in production.