DNSSEC question

asked 2024-10-13 18:41:46 +0000

net_tech gravatar image

updated 2024-10-13 23:32:36 +0000

Hi,

We are using DNSSEC on the internal network (Windows 2022 DNS server / 172.16.4.10). Recently I came across a chrome extension from https://dnssec.uz and added it to my browser.

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When accessing phl-esxi1 the extension confirms that DNSSEC is enabled and working correctly, but if i look at DNS traffic in Wireshark, nothing in the DNS answer options has any indication of DNSSEC being present.

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Does DNSSEC use something other than DNS protocol to check the authenticity of the record?

Thanks

Edit:

Seeing DNSSEC fields after getting GPO applied to the computer object

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Comments

What is the full domain for phl-esxi1? (The column is truncated in the Wireshark screenshot)

Chuckc gravatar imageChuckc ( 2024-10-13 20:28:40 +0000 )edit

it's ourdomain.local

truncated to hide the identity

net_tech gravatar imagenet_tech ( 2024-10-13 20:56:32 +0000 )edit

Have you looked at this presentation: dnssec.uz: Protect your website

Is the browser extension using dnsviz probe?

Chuckc gravatar imageChuckc ( 2024-10-13 21:40:27 +0000 )edit

the chrome extension is irrelevant, i only mentioned it to show that DNSSEC is enabled.

I may have figured it out, AD team blocked the inheritance on the GPO with DNSSEC name resolution policy. Once computer object moved out to another OU, the policy applied and I am able to see additional records I was missing earlier.

net_tech gravatar imagenet_tech ( 2024-10-13 23:27:06 +0000 )edit

So Wireshark did not display the data that is not in the capture file?

There are sample captures in Wireshark Gitlab issues - search on "dnssec"

Chuckc gravatar imageChuckc ( 2024-10-14 12:50:31 +0000 )edit
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