This line ... > ;; SERVER: 4.2.2.1#53(4.2.2.1) ... tells you the DNS server which returned the result, which in this case, is more than likely a caching (recursive) DNS server. If verbose enough logging is enabled on that caching server, it should tell you which primary DNS server returned a particular query result. The "@ns1.myserver" feature in DIG allows you to do that test directly from your workstation to the primary DNS server(s). Is there any particular reason this won't work for you? Perhaps if you explained your problem in more detail, someone on this list could offer alternative methods of troubleshooting. Regards, Ken ----- Message from Rudi at SoftDux.com --------- Date: Mon, 07 Jul 2008 17:38:22 +0200 From: Rudi Ahlers <Rudi at SoftDux.com> Reply-To: CentOS mailing list <centos at centos.org> Subject: Re: [CentOS] how do I find out which nameserver returns a DNS query? To: CentOS mailing list <centos at centos.org> >>> >> > Hi Ken > > I thought dig would return it, but it doesn't. > > Look at this: > > > dig hfserver1.hostfactor.co.za > > ; <<>> DiG 9.3.3rc2 <<>> hfserver1.hostfactor.co.za > ;; global options: printcmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17016 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 > > ;; QUESTION SECTION: > ;hfserver1.hostfactor.co.za. IN A > > ;; ANSWER SECTION: > hfserver1.hostfactor.co.za. 6000 IN A 196.34.136.50 > > ;; Query time: 287 msec > ;; SERVER: 4.2.2.1#53(4.2.2.1) > ;; WHEN: Mon Jul 7 17:36:45 2008 > ;; MSG SIZE rcvd: 60 > > > > I know I can dig @server - but I want to know which is the active > server that returns a result at the moment > > -- > > Kind Regards > Rudi Ahlers > CEO, SoftDux > > Web: http://www.SoftDux.com > Check out my technical blog, http://blog.softdux.com for Linux or other > technical stuff, or visit http://www.WebHostingTalk.co.za for Web > Hosting stuff > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos ----- End message from Rudi at SoftDux.com -----