about resolving on a child zone
hello, I have the domain saying it's example.com. I defined a NS (and its A rcd) as below: my.example.com. IN NS mydns.example.com. mydns.example.com. IN A 11.22.33.44 Also I added this A record in both main DNS and the child zone's DNS (mydns.example.com). www.my.example.com. IN A 55.66.77.88 When I query for www.my.example.com, who will respond for it? the main DNS or that mydns? Can I set only www.my.example.com in main DNS while not in mydns? Thanks for your kind helps. Regards. The new Internet Explorer 8 optimised for Yahoo!7: Faster, Safer, Easier. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
On Apr 13, 2009, at 6:28 AM, Tech W. wrote: hello, I have the domain saying it's example.com. I defined a NS (and its A rcd) as below: my.example.com. IN NS mydns.example.com. mydns.example.com. IN A 11.22.33.44 Also I added this A record in both main DNS and the child zone's DNS (mydns.example.com). www.my.example.com. IN A 55.66.77.88 When I query for www.my.example.com, who will respond for it? the main DNS or that mydns? Can I set only www.my.example.com in main DNS while not in mydns? You should try it and see what happens. Use named-checkzone to check both copies of the zone for errors. In this case, the answer is that your main zone (example.com) will have an error, because it will have an A record below the "bottom" of the zone that is not a glue record. In other words, it will recognize that www.my.example.com belongs to my.example.com, not to example.com. Chris Buxton Professional Services Men & Mice ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
--- On Tue, 14/4/09, Chris Buxton wrote: > From: Chris Buxton > Subject: Re: about resolving on a child zone > > In this case, the answer is that your main zone > (example.com) will have an error, because it will have an A > record below the "bottom" of the zone that is not a glue > record. In other words, it will recognize that > www.my.example.com belongs to my.example.com, not to > example.com. > Thanks Chris for the good info. How about this case below? my.example.com. IN NS ns.my.example.com. ns.my.example.com. IN A 11.22.33.44 Under this case, the A record for ns.my.example.com. will be defined in main DNS or "ns.my.example.com" or both? Thanks again. Regards. Enjoy a better web experience. Upgrade to the new Internet Explorer 8 optimised for Yahoo!7. Get it now. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
On Apr 13, 2009, at 5:29 PM, Tech W. wrote: --- On Tue, 14/4/09, Chris Buxton wrote: From: Chris Buxton Subject: Re: about resolving on a child zone In this case, the answer is that your main zone (example.com) will have an error, because it will have an A record below the "bottom" of the zone that is not a glue record. In other words, it will recognize that www.my.example.com belongs to my.example.com, not to example.com. Thanks Chris for the good info. How about this case below? my.example.com. IN NS ns.my.example.com. ns.my.example.com. IN A 11.22.33.44 Under this case, the A record for ns.my.example.com. will be defined in main DNS or "ns.my.example.com" or both? Both. This is a glue record, which is a special case. Chris Buxton Professional Services Men & Mice ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
In article , "Tech W." wrote: > --- On Tue, 14/4/09, Chris Buxton wrote: > > > From: Chris Buxton > > Subject: Re: about resolving on a child zone > > > > > In this case, the answer is that your main zone > > (example.com) will have an error, because it will have an A > > record below the "bottom" of the zone that is not a glue > > record. In other words, it will recognize that > > www.my.example.com belongs to my.example.com, not to > > example.com. > > > > Thanks Chris for the good info. > How about this case below? > > my.example.com. IN NS ns.my.example.com. > ns.my.example.com. IN A 11.22.33.44 > > > Under this case, the A record for ns.my.example.com. will be defined in main > DNS or "ns.my.example.com" or both? There's a special exception made for "glue" records, since they're needed to prevent an infinite recursion. The parent zone will include this A record. -- Barry Margolin, bar...@alum.mit.edu Arlington, MA *** PLEASE don't copy me on replies, I'll read them in the group *** ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
RE: about resolving on a child zone
> Original Message > Subject: Re: about resolving on a child zone > From: Chris Buxton > Date: Mon, April 13, 2009 10:31 am > To: Tech W. > Cc: bind-users@lists.isc.org > > In this case, the answer is that your main zone (example.com) will > have an error, because it will have an A record below the "bottom" of > the zone that is not a glue record. In other words, it will recognize > that www.my.example.com belongs to my.example.com, not to example.com. > Chris, You said main zone will get an error b/c it has that an A record below the bottom of the zone. Is it correct if that A record was on the top of the zone? like: www.my.example.com. IN A 11.22.33.44 my.example.com. IN NS ns.my.example.com. ns.my.example.com. IN A 55.66.77.88 Thanks too. Regards. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
Thanks for chris, barry and all. --- On Tue, 14/4/09, Barry Margolin wrote: > > There's a special exception made for "glue" records, since > they're > needed to prevent an infinite recursion. The parent > zone will include > this A record. Enjoy a safer web experience. Upgrade to the new Internet Explorer 8 optimised for Yahoo!7. Get it now. ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: about resolving on a child zone
On Apr 14, 2009, at 3:00 AM, Jeff Pang wrote: In this case, the answer is that your main zone (example.com) will have an error, because it will have an A record below the "bottom" of the zone that is not a glue record. In other words, it will recognize that www.my.example.com belongs to my.example.com, not to example.com. Chris, You said main zone will get an error b/c it has that an A record below the bottom of the zone. Is it correct if that A record was on the top of the zone? like: www.my.example.com. IN A 11.22.33.44 my.example.com. IN NS ns.my.example.com. ns.my.example.com. IN A 55.66.77.88 No, I didn't mean positionally within the zone file. Record order is mostly irrelevant in zone files (but the SOA record must be first). The "bottom" of a zone is any delegation point to a subzone. "www.my" is below a delegation of "my". The exception is glue records, which are address records that belong to the subzone but are present to support the delegation itself. Chris Buxton Professional Services Men & Mice ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Position of SOA in master file (was: Re: about resolving on a child zone)
On Apr 14 2009, Chris Buxton wrote: No, I didn't mean positionally within the zone file. Record order is mostly irrelevant in zone files (but the SOA record must be first). No, it need not be first. It's *conventional* to put it first. It's only *necessary* if you (a) have no $TTL directive (b) have no explicit TTL on the first RR in the master file. Or at least, with the various BIND backwards-compatibility features, that's the case. -- Chris Thompson Email: c...@cam.ac.uk ___ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
