Re: Disappearing DNS PTR entry

Tech-Archive recommends: Fix windows errors by optimizing your registry



I’m a little confused. The RDNS name/number that comes up missing is an
internal address. How would my ISP create that number on my internal system
or for that matter even care? I believe this is an internal problem. If my
workstations do a lookup for our internal DC they get an error because the
pointer doesn’t exist in our internal DNS.
--
Patrick Kneeland
Systems Administrator


"Cris Hanna [SBS-MVP]" wrote:

Are you trying to create the PTR record in your own SBS DNS record? If so thats not where you need it.

It needs to be in your public DNS records and is usually created by the ISP who supplies your IP addresses, but could also be done whereever you site is hosted.

--
Cris Hanna [SBS-MVP]
-------------------------------------------------
Microsoft MVPs
Independent Experts (MVPs do not work for MS)
Real World Answers
---------------------------------------------------------
Please do not contact me directly regarding issues

"Bigfoot" <Bigfoot@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:B1DC1C2A-AF9A-4A91-84F7-C90E9E574F82@xxxxxxxxxxxxxxxx
I have a PTR record that disappears from the RDNS lookup. The A record is
never affected and is always in the forward lookup. This record is the DC. We
noticed it and manually added it back only for it to be removed a couple
hours later. I then recreated the A record in the forward lookup zone and had
it recreate the PTR record. The PTR record was gone a few hours later. I then
found an article saying to disable the Scavenge stale resource records and
manually add the PTR record again. I did that and the record disappeared
again.

I have seen a couple articles with this exact problem but it wasn’t
explained what caused the problem. I want to know why this is happening and
what to do to fix it. Any help would be appreciated.

Thank you.

--
Patrick Kneeland
Systems Administrator
.



Relevant Pages

  • Re: Static IP address blocked by anti spam lists
    ... He got a static IP address, but he had no RDNS, so he got listed. ... Call your ISP. ... We have whitelisted the mail server of most major ISPs, ... the rDNS PTR record will need to be done ...
    (microsoft.public.windows.server.sbs)
  • Re: Undeliverable Mail
    ... You would be asking your ISP to map the PTR record for the IP address back ... Note that your ISP may not be willing to do this. ... A Smarthost simply means that instead of your server directly connecting to ...
    (microsoft.public.exchange.admin)
  • Re: Static IP address blocked by anti spam lists
    ... Contact your ISP to setup a PTR record for you. ... your mail software to send outgoing mail through your ISP's dedicated ... outgoing mail server. ...
    (microsoft.public.windows.server.sbs)
  • Re: PTR record setup
    ... PTR record on their DNS host's servers or their own public-facing ... something in the lookup mechanism that makes it only work if the ISP ... While discussing PTR records for mail servers in a Vamsoft ORF ...
    (microsoft.public.windows.server.sbs)
  • Re: PTR record setup
    ... PTR record on their DNS host's servers or their own public-facing ... something in the lookup mechanism that makes it only work if the ISP ... While discussing PTR records for mail servers in a Vamsoft ORF ...
    (microsoft.public.windows.server.sbs)