Linux  DNS Update and DNS Server and MAC DNS Update

LateNaite
LateNaite used Ask the Experts™
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Just wondering if anyone knows how Linux and MAC update their hostname or PTR record to the DNS and secondly, we have a Linux based (don't look like bind however) with host entries and mac addresses (used for dot1x also) and how to get those hostnames migrated over to the Windows based DNS server and if the DNS PTR works with dynamic registration, guess there is no need to migrated the hostnames over.

Thank you in advance,
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nociSoftware Engineer
Distinguished Expert 2018

Commented:
In most Unix environments the DHCP server is authorized to update DNS.
So there is no need to allow access from all kinds of systems, just a few system that are under (hopefully) thigh management.

Migrating to Windows DNS wil mean that EITHER you need to allow the DHCP server to update the windows DNS (using DNS access methods).
or you will need to change all workstations to not only do DHCP but also update the DNS themselves...

The updating by the DHCP server also makes the DHCP server remove dropped leases. So there should not be polutions in the DNS from systems that never remove their old addresses.
Distinguished Expert 2017

Commented:
Noci pointed out, the option you can allow-update from the segment

Not the ..noci raised
David FavorFractional CTO
Distinguished Expert 2018

Commented:
1) Just wondering if anyone knows how Linux and MAC update their hostname...

They don't hostnames are set at the machine level + never change by any external means.

DNS records... change when they're changed at the DNS level, rather than machine level.

2) or PTR record to the DNS

PTR records are owned by the ISP or hosting company providing you with IPs.

Normally no DNS change you make will have any effect on this, as you don't own the records.

PTR records are changed in your dashboard (for good companies like OVH).

In most cases, you'll have to open a support ticket to set your PTR records.

3) and secondly, we have a Linux based (don't look like bind however) with host entries and mac addresses (used for dot1x also)

No clue what this means, unless maybe you're talking about systemd-resolved running.

Clarify what you mean by "tool".

4) and how to get those hostnames migrated over to the Windows based DNS server

Requires clarification, see #3. Provide the name of your "tool", along with some sample output.

5) and if the DNS PTR works with dynamic registration, guess there is no need to migrated the hostnames over.

See #2. No way for you to effect PTR records.

Note: Maybe you mean something else besides a real PTR record. A PTR record returns a hostname, given an IP.

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