DNS/Bind problems on Mac OS X clients

We have two DNS/DHCP servers setup.  One is at a remote data center and one at the local facility.  DNS works fine at both sites for Windows clients, but does not for Mac clients at the local facility.  We prefer that all users use the local DNS server to reduce WAN traffic.

At the local site, we are using CentOS 5.5 with bind version "BIND 9.3.6-P1-RedHat-9.3.6-4.P1.el5_5.3".  At the remote site, we are using a really old version - FC4 with bind version "BIND 9.3.2".

Again, Windows clients work fine when using either DNS server.  Mac works fine on the remote server, but constantly shows "page cannot be displayed" when surfing to any site when using the local DNS server.  If you keep refreshing, the Mac browser will work for a while, then time out again.  It is very disruptive.  For now, a have hardcoded the dhcpd.conf file to redirect DNS for all internal Macs at the local site to pull DNS from the remote server.  It works, but I would rather not go across the WAN.

Can someone please point me in the right direction on how to troubleshoot and resolve this?

Thanks.
shannon_adamsAsked:
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bevhostCommented:
Do you have IPv4 only or IPv4 + IPv6?
Duncan RoeSoftware DeveloperCommented:
The time-outs suggest to me that the local DNS thinks it has to reload a zone file for every / many MAC queries. Do the queries differ between MAC & Windows? (tcpdump should tell you)

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shannon_adamsAuthor Commented:
Thanks for the suggestion.  I will check out tcpdump and let you know the results.
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