AX86S: router.asus.com opens on mobile devices but not iMac

[SunrisePro]

I'm testing out our new router and all seems well - except I can't access router.asus.com on my iMac. I have no problem on an iPhone, iPad, or MacBook - just not my iMac, which shows this error, like a non-existent domain:

Hmmm… can't reach this page
Check if there is a typo in router.asus.com.
DNS_PROBE_FINISHED_NXDOMAIN

I am on the right network (I disabled my old router for testing), and I checked in 3 browsers with the same results, so it's a computer-specific issue. I don't have any internet security suite installed, just Bitdefender as a virus scanner. And I never had issues connecting to my old router's web admin.

Thoughts?

 

[ColinTaylor]

Your iMac probably isn't using the router as it's DNS server. Check the iMac's network settings.

 

[SunrisePro]

I do see DNS servers set in the Mac wifi settings. Are they supposed to be empty?

 

[SunrisePro]

Thanks - that was it.