Much obliged Chris: I'll give that a go. Just out of interest though, how come you can't just specify a netmask? It seems convoluted to have such different ways of specifying reverse forwarders for classfull and classless Subnets.
C. -----Original Message----- From: Chris Buxton [mailto:cbux...@menandmice.com] Sent: 08 April 2009 18:20 To: Callum Millard Cc: Bind Users Mailing List Subject: Re: Trouble configuring forwarders for reverse zones. You would create a /16 or /24 parent zone. For example, you could use a zone named 1.1.10.in-addr.arpa. From that zone, you would delegate the /28 reverse zone using a syntax along these lines: 0/28.1.1.10.in-addr.arpa. NS 1.other.name.server. 0/28.1.1.10.in-addr.arpa. NS 2.other.name.server. 1.1.1.10.in-addr.arpa. CNAME 1.0/28.1.1.10.in-addr.arpa. 2.1.1.10.in-addr.arpa. CNAME 2.0/28.1.1.10.in-addr.arpa. [...] 14.1.1.10.in-addr.arpa. CNAME 14.0/28.1.1.10.in-addr.arpa. You can simplify the creation of the CNAME records using a $GENERATE statement: $GENERATE 1-14 1 CNAME 1.0/28 I have omitted the origin here for brevity. Chris Buxton Professional Services Men & Mice On Apr 8, 2009, at 8:45 AM, M-lists wrote: > Apologies, I meant 10.1.1.0/28 not /24. The addresses used are > arbitrary, > as I don't like detailing my network topology unnecessarily. > Suffice to say > we've had the */28 subnet dished out and have to work with it. > > Thanks for the suggestions in your last paragraph Chris, but I > didn't follow > them entirely. Does anyone know the syntax to forward reverse > queries for > 10.1.1.1/28 on to a given host, or is it a bit more complex than with > 10.1.0.0/16, as Chris' last paragraph suggests? > > Thanks again, > > > C. > > -----Original Message----- > From: Chris Buxton [mailto:cbux...@menandmice.com] > Sent: 08 April 2009 15:24 > To: Callum Millard > Cc: bind-users@lists.isc.org > Subject: Re: Trouble configuring forwarders for reverse zones. > > On Apr 8, 2009, at 3:00 AM, M-lists wrote: >> One further thing, I'll be moving things around on our network soon, >> and >> this means we'll have a classless subnet soon. So if we moved one >> of our >> Windows subnets to 10.1.1.0/24, how would I forward reverse queries >> for this >> subnet to say 10.1.1.1? > > When you say "classless subnet", what do you mean? A /24 is not a > classless subnet as I understand the phrase. > > If you really do mean the same thing I do when I use that phrase, a > subnet such as a /25 or /26, the first thing I would ask is why do > this? You have 10/8 to work with. If you mean a classless subnet such > as a /22 or /21, it's easier to just create the individual /24 reverse > zones than to create a classless subnet reverse zone. > > In general, a classless subnet reverse zone relies on CNAME records to > "move" the PTR record owner name to a new name, in an artificial zone. > This requires a parent zone to create the CNAME records. (For zones > larger than /24, use DNAME records instead of CNAME records.) So your > BIND server might need a 10.1/16 zone, or possibly a 10.1.1/24 reverse > zone - a parent zone using the standard naming convention that can > then delegate artificial subzones elsewhere and can contain the CNAME > or DNAME records needed to rename the PTR records into the subzone. > > Chris Buxton > Professional Services > Men & Mice > > _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
