0

  • My home LAN has a Windows Active Directory domain, with the DNS name corp.example.com.

  • My Synology NAS has the FQDN nas.corp.example.com..

  • My Windows 10 desktop has the FQDN cube.corp.example.com..

  • I am using split-brain DNS:

    • The DNS servers within my home LAN will report that nas.corp.example.com is 172.16.1.10.
    • The Internet-accessible public DNS server for example.com will return A IN 2.718.281.828 for queries for both nas.corp.example.com and corp.example.com - where 2.718.281.828 is my home router's public IPv4 address (I use port forwarding, ofc).

  • Both my (Windows 10) desktop computer and Synology NAS are domain-joined.

    • Running ipconfig /all on my desktop reports Primary Dns Suffix: corp.example.com.

  • Therefore I expect Windows 10 to know that nas.corp.example.com. (FQDN) and nas (single-label) are the same host.

  • But Windows 10 File Explorer lists my NAS twice: first with the FQDN and again with the single-label name.

  • Answer me these questions three:

    • Why is it doing this?
    • Is this benign, or does it cause issues (e.g. extraneous lookup requests, too many connections, SMB issues?)
    • How can I make it coalesce the two nodes into one?

Screenshot proof:

enter image description here

Dai
  • 2,290
  • 8
  • 27
  • 43
  • What is a DC (OS, version)? What is domain level? How is WINS configured in the domain? – Nikita Kipriyanov Feb 16 '21 at 06:01
  • @NikitaKipriyanov The DC is Windows Server 2012 R2. The forest and domain functioning levels are both 2012 R2. There are no WINS servers in the domain (at least that I know of). – Dai Feb 16 '21 at 06:04

0 Answers0