topic Re: DNS Proxy technical details? in General Topics

DNS Proxy technical details?

Mr_Kaplan — Wed, 10 Nov 2021 16:48:41 GMT

I am checking out DNS proxy as a possible use case. We have a requirement to log DNS requests that include the true source info. We have a few environments with wireless clients that will not otherwise have our normal agents or tools installed in order to get DNS info. If it goes through the firewall for DNS proxy, where are the logs tied to the true source machine that sent the request? If the firewall responds with local cache, is that logged? If it forwards the request to an internal DNS server, is that logged so we can see the actual source? I assume the downstream DNS server will simply see the management IP of the firewall as the source from its perspective. I have checked the documentation, but haven't seen in-depth diagrams or descriptions to understand the full flow.

Re: DNS Proxy technical details?

OtakarKlier — Thu, 18 Nov 2021 16:53:18 GMT

Hello,

The PAN will log the source IP of the machine and the user-id if enabled. Not sure what DNS you are using but maybe you can get logs from the DNS server directly?

Regards,

Re: DNS Proxy technical details?

johnwalshaw — Thu, 25 Nov 2021 22:57:46 GMT

I have tested DNS proxy on Palo and it worked great. I have not investigated the log detail.