Multiple DNS

Ted Mittelstaedt tedm at
Tue Feb 21 12:34:46 PST 2006

DNS lookups aren't being slow because you need a secondary DNS
server.  Something else in your network or in your configuration
is wrong.  We serve DNS for
thousands of customers off of a pair of systems that are basically
equivalent to pentium pro 200's with 128MB of ram.

Keep in mind most Windows systems will not switch over to the
secondary DNS server defined in their configuration unless traffic
to the primary is kicked back with an icmp message host unreachable,
or some such.


>-----Original Message-----
>From: owner-freebsd-questions at
>[mailto:owner-freebsd-questions at]On Behalf Of Robert Slade
>Sent: Saturday, February 18, 2006 11:46 PM
>To: freebsd-questions at
>Subject: Multiple DNS
>I am looking for some advice. I have a network which is based on a
>number of servers running FreeBsd 6.0 serving Win XP work stations. (yes
>I know but..) The network is large enough to use DHCP and DNS for the
>internal network, I have setup a DHCP server with a Dynamic DNS (Bind 9)
>on one of the servers. That server is handling the LDAP side of the
>There appears to be a fair bit of DNS Traffic which leads to a secondary
>DNS being required to take some of the load as DNS lookup are slow. The
>question I have is should I just setup a cashing DNS on another server
>using the primary as a forwarder or even several servers eg the mail
>server and the secondary LDAP server, or should I setup a proper
>secondary DNS using my ISP as a forwarder with dynamic updates from the
>Sorry if this is a bit vague, but I have no experience in this area.
>freebsd-questions at mailing list
>To unsubscribe, send any mail to
>"freebsd-questions-unsubscribe at"
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.1.375 / Virus Database: 267.15.12/265 - Release
>Date: 2/20/2006

More information about the freebsd-questions mailing list