ASUS router DNS check fix: Difference between revisions
Created page with "== Introduction == After updating the firmware of my Asus RT-AX92U to version <code>3.0.0.4.388_22525-gd35b8fe</code>, I've noticed two DNS requests to <code>dns.msftncsi.com</code> every minute. My RT-AX92U is used as an access point, so there is '''zero''' reason to check for WAN availability. Additionally <code>DNS</code> is unchecked in <code>Administration > System > Network Monitoring</code>. Ok, let's verify the settings in nvram: <pre> dns_probe=0 dns_probe_co..." |
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Latest revision as of 17:41, 25 February 2023
Introduction
After updating the firmware of my Asus RT-AX92U to version 3.0.0.4.388_22525-gd35b8fe, I've noticed two DNS requests to dns.msftncsi.com every minute. My RT-AX92U is used as an access point, so there is zero reason to check for WAN availability. Additionally DNS is unchecked in Administration > System > Network Monitoring.
Ok, let's verify the settings in nvram:
dns_probe=0 dns_probe_content=* dns_probe_host=
Yep, it's not active and there is no host set either. So why is it doing a DNS check? Apparently dns.msftncsi.com was hard-coded as default and the dns_probe setting is ignored.
Solution
ssh into the RT-AX92U and run the following commands:
nvram set dns_probe_host=127.0.0.1 nvram commit
Done.
P.S.: It might also be possible to do this via the UI, but I haven't tried that. Check DNS in Administration > System > Network Monitoring, enter 127.0.0.1 in the field Resolve Hostname, and click Apply. After that one can uncheck DNS and click Apply again, although the disabled state is ignored anyway.