About a reverse delegation for a subnetted zone <inputio.com> 11/20/2008 3:10:33 PM Hi guys, i need to delegate a reverse zone for my Microsoft Dns Server W2K3 to another external dns server. The problem is that i would delegate only a part of this zone (my subnet is 192.168.10.1 - 255.255.255.128) so if a client query for example ip : 192.168.0.10 the resolution is demand to external dns otherwise if a client query for ip 192.168.0.201 my MS DNS Server resolve the request. I try to delagate a complete zone and all work fine but how i can delagate only a part (subnet) of this ? Microsoft DNS can make it ? Thanks in advance.

Re: About a reverse delegation for a subnetted zone "A, Deji" <deji[ at ]akomolafe.com> 11/24/2008 10:04:33 PM You want to delegate a reverse zone, or you want to reverse-delegate a range of IPs? I tried to understand what you are asking, but I am not very sure that I understand it. You do know that clients query DNS for a "name" resolution, right? They have a name (not IP) and they ask the DNS server to go look for the IP for that "name". The way I'm reading what you wrote, it looks like you want client to go to a particular DNS server IF they are looking for a particular "IP address". If I am mistaken, could you try and rephrase your question? I realize that English may not be your primary language, so please don't think that I am insulting you. Deji <inputio.com> wrote in message news:u6yjjIySJHA.4504[ at ]TK2MSFTNGP02.phx.gbl... [Quoted Text] > Hi guys, > > i need to delegate a reverse zone for my Microsoft Dns Server W2K3 to > another external dns server. > > The problem is that i would delegate only a part of this zone (my subnet > is 192.168.10.1 - 255.255.255.128) so if a client query for example ip : > 192.168.0.10 the resolution is demand to external dns otherwise if a > client query for ip 192.168.0.201 my MS DNS Server resolve the request. > > I try to delagate a complete zone and all work fine but how i can > delagate only a part (subnet) of this ? Microsoft DNS can make it ? > > Thanks in advance. >

Re: About a reverse delegation for a subnetted zone Andrew Hodgson <me3[ at ]privacy.net> 11/27/2008 9:40:57 PM On Thu, 20 Nov 2008 16:10:33 +0100, <inputio.com> wrote: [Quoted Text] >Hi guys, > >i need to delegate a reverse zone for my Microsoft Dns Server W2K3 to >another external dns server. > >The problem is that i would delegate only a part of this zone (my subnet is >192.168.10.1 - 255.255.255.128) so if a client query for example ip : >192.168.0.10 the resolution is demand to external dns otherwise if a client >query for ip 192.168.0.201 my MS DNS Server resolve the request. > >I try to delagate a complete zone and all work fine but how i can delagate >only a part (subnet) of this ? Microsoft DNS can make it ? The way I have done this before (on a complex network with loads of /28s is to create a parent zone on the upstream DNS, then create NS records pointing at the relevant DNS servers on the subnets. For example: Create the zone 1.168.192.in-addr.arpa (192.168.1.x), we then have two subnets so far, a /30 subnet and a /28 subnet. 0.1.168.192.in-addr.arpa. CNAME 0.0-3.1.168.192.in-addr.arpa 1.1.168.192.in-addr.arpa. CNAME 1.0-3.1.168.192.in-addr.arpa 2.1.168.192.in-addr.arpa. CNAME 2.0-3.1.168.192.in-addr.arpa 3.1.168.192.in-addr.arpa. CNAME 3.0-3.1.168.192.in-addr.arpa 4.1.168.192.in-addr.arpa. CNAME 4.4-19.1.168.192.in-addr.arpa Create the NS records. 0-3.1.168.192.in-addr.arpa. ns ns1.30site.com. 4-19.1.168.192.in-addr.arpa. ns ns1.28site.com. Then on the relevant nameservers create the zones: 0-3.1.168.192.in-addr.arpa, for examples, and add the relevant records. In our case the DNS servers on the private networks were forwarding to the master DNS servers, which had all the routes to the other DNS servers for the rest of the IP space, so the users could resolve the PTR records correctly. The only issue we had with this was that some clients did not register the PTR records when doing dynamic updates, however, this only seemed to be a few clients. You could also look at the possability of using selective forwarding to do this, though this would need fleshing out. Thanks. Andrew.