Also related to this issue perhaps, might be the client OS? Wasn't XP really finicky about sticking to one DNS server, and if it went down, it didn't properly fail over to the secondary one?
On Fri, Jul 5, 2013 at 11:46 AM, Andrew S. Baker <[email protected]> wrote: > Thanks, Pierre > > What DNS settings are configured on each of your DNS servers (in terms of > their primary and secondary DNS lookups)? > > Regards, > > > > > > *ASB > **http://XeeMe.com/AndrewBaker* <http://xeeme.com/AndrewBaker>* > **Providing Virtual CIO Services (IT Operations & Information Security) > for the SMB market…*** > > > > > On Fri, Jul 5, 2013 at 3:21 AM, Pierre-Marie Camilleri < > [email protected]> wrote: > >> Hi Andrew**** >> >> ** ** >> >> Thanks for replying. Yes, all users were impacted. As far as I could see >> DNS replication seems to be working. However, when querying certain things >> I discovered some problems.**** >> >> I was able to resolve all sites from the additional DNS server but not >> from the primary DNS server. I next looked at the DNS manager and when >> looking at the primary DNS server I am seeing Automated Test Query Failed >> message. **** >> >> When checking the System Event Log of the primary domain controller I am >> seeing 5774 Events (NETLOGON) being logged every day.**** >> >> ** ** >> >> Regards**** >> >> Pierre**** >> >> ** ** >> >> ** ** >> >> *From:* [email protected] [mailto: >> [email protected]] *On Behalf Of *Andrew S. Baker >> *Sent:* 04 July 2013 18:47 >> *To:* ntsysadm >> *Subject:* Re: [NTSysADM] Unable to browse the Web when additional >> domain controller goes down**** >> >> ** ** >> >> Hi Pierre,**** >> >> ** ** >> >> Were all users impacted, or only some of them?**** >> >> ** ** >> >> How is external DNS handled? Forwarding Servers or Root Servers? >> >> Was DNS replication working properly prior to the shutdown?**** >> >> ** ** >> >> Can you resolve all the sites in question from the DNS server?**** >> >> ** ** >> >> Any eventlog messages?**** >> >> ** ** >> >> Regards,**** >> >> >> **** >> >> **** >> >> **** >> >> *ASB >> **http://XeeMe.com/AndrewBaker* <http://xeeme.com/AndrewBaker>* >> **Providing Virtual CIO Services (IT Operations & Information Security) >> for the SMB market…***** >> >> ** ** >> >> ** ** >> >> On Thu, Jul 4, 2013 at 10:18 AM, Pierre-Marie Camilleri < >> [email protected]> wrote:**** >> >> Hi everyone**** >> >> **** >> >> Had to shut down our additional domain controller due to maintenance work >> this afternoon and a few minutes later users complained that they were >> unable to browse the Web and also certain files from our file server. *** >> * >> >> I cannot understand why this should have happened. Any idea why this >> happened?**** >> >> **** >> >> Thanks**** >> >> Pierre**** >> >> **** >> >> **** >> >> **** >> >> ** ** >> > >
