Re: [Pdns-users] PDNS-Recursor Not Providing DNS Lookups?
On Fri, Aug 22, 2008 at 01:43:32PM -0600, Darren Gamble wrote: Hi everyone, Just to throw my two cents in here... I'm not sure what to do now - it might be good for PowerDNS to set the 'rd' bit in forwarded queries. We've been meaning to open up a trac ticket for this. Our organization actually has situations where we'd like powerdns to use the rd bit, and also situations where we don't. Please open up such a ticket, and it will happen. I think the best way to handle this would be two different configuration directives to handle the two different situations. Most likely, indeed. Bert -- http://www.PowerDNS.com Open source, database driven DNS Software http://netherlabs.nl Open and Closed source services ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] PDNS-Recursor Not Providing DNS Lookups?
On Fri, Aug 22, 2008 at 07:42:31PM +0200, bert hubert wrote: On Fri, Aug 22, 2008 at 12:30:36PM -0400, Steve Chapman wrote: I'm working in an environment that uses split DNS (some parentcompany.com servers we want resolved from corporate DNS servers, others from Internet DNS servers). I've installed the pdns-recursor RPM (3.1.7-1) on my RHEL 5 bind DNS server and configured the recursor, all defaults except: Very good! If I run an nslookup Server2.parentcompany.com IP of Corporate DNS server, I get a valid IP address, and then if I subsequently re-run the nslookup against the PDNS Recursor, it provides the answer from then on. Why isn't it providing the answer initially? Any ideas would be helpful. The reason is that PowerDNS is expecting you to forward queries to an authoritative server. It appears you are forwarding them to a server that is not authoritative for Server2.parentcompany.com, but is in itself a caching resolver. PowerDNS is sending so called 'non-recursion desired' questions to your internal nameserver, and this internal server is therefore not recursing for your questions. Once you've triggered the internal server to look the question up, it keeps the answer in the cache. The second time PowerDNS asks, no recursion is needed, since the answer is there already. I'm not sure what to do now - it might be good for PowerDNS to set the 'rd' bit in forwarded queries. Any ideas? I vote for setting the 'rd' bit in the forwarded queries. That certainly best fits the behavior that I was expecting to see. Regards, Ken ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
Re: [Pdns-users] PDNS-Recursor Not Providing DNS Lookups?
On Fri, Aug 22, 2008 at 01:40:05PM -0500, Kenneth Marshall wrote: On Fri, Aug 22, 2008 at 07:42:31PM +0200, bert hubert wrote: On Fri, Aug 22, 2008 at 12:30:36PM -0400, Steve Chapman wrote: I'm working in an environment that uses split DNS (some parentcompany.com servers we want resolved from corporate DNS servers, others from Internet DNS servers). I've installed the pdns-recursor RPM (3.1.7-1) on my RHEL 5 bind DNS server and configured the recursor, all defaults except: Very good! If I run an nslookup Server2.parentcompany.com IP of Corporate DNS server, I get a valid IP address, and then if I subsequently re-run the nslookup against the PDNS Recursor, it provides the answer from then on. Why isn't it providing the answer initially? Any ideas would be helpful. The reason is that PowerDNS is expecting you to forward queries to an authoritative server. It appears you are forwarding them to a server that is not authoritative for Server2.parentcompany.com, but is in itself a caching resolver. PowerDNS is sending so called 'non-recursion desired' questions to your internal nameserver, and this internal server is therefore not recursing for your questions. Once you've triggered the internal server to look the question up, it keeps the answer in the cache. The second time PowerDNS asks, no recursion is needed, since the answer is there already. I'm not sure what to do now - it might be good for PowerDNS to set the 'rd' bit in forwarded queries. Any ideas? I vote for setting the 'rd' bit in the forwarded queries. That certainly best fits the behavior that I was expecting to see. Maybe add a seperate option like this ?: forward-zones-with-rdbit= ? recurse-forward-zones= ? Regards, Ken ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
RE: [Pdns-users] PDNS-Recursor Not Providing DNS Lookups?
Hi everyone, Just to throw my two cents in here... I'm not sure what to do now - it might be good for PowerDNS to set the 'rd' bit in forwarded queries. We've been meaning to open up a trac ticket for this. Our organization actually has situations where we'd like powerdns to use the rd bit, and also situations where we don't. I think the best way to handle this would be two different configuration directives to handle the two different situations. Darren Gamble Systems Architect, Regional Services Shaw Cablesystems GP 630 - 3rd Avenue SW Calgary, Alberta, Canada T2P 4L4 (403) 781-4948 ___ Pdns-users mailing list Pdns-users@mailman.powerdns.com http://mailman.powerdns.com/mailman/listinfo/pdns-users
