RT-AC86U HTTPS certificate issues

[lepicane]

One of those days...

The generic HTTPS certificate generated in my RT-AC86U stopped being valid in Google Chrome so I thought I'd try the Let's Encrypt certificate. Created host name in the WAN>DDNS tab, registered it, generated the Let's Encrypt certificate and all worked fine...until I decided to stop using it.

So, I deregistered my host name in the WAN>DDNS tab and it is no longer recognised at https://iplookup.asus.com/nslookup.php, and I disabled DDNS, however when I generate a certificate in the Administration>System tab and want to install it in Windows, it still says it is issued to my deregistered DDNS 'host name.asuscomm.com'. Not router.asus.com or my router IP?

What am I doing wrong?

 

[Justinh]

Did you reboot the router after you de-registered DDNS? (Just a guess. I hope a reset is not necessary.)
And "Enable Web Access from WAN" is off?

ref https://www.asus.com/support/FAQ/1034294

 

[lepicane]

Did you reboot the router after you de-registered DDNS? (Just a guess. I hope a reset is not necessary.)
And "Enable Web Access from WAN" is off?

ref https://www.asus.com/support/FAQ/1034294

Yep, rebooted and all. In the end did a factory reset and that resolved the issue, however generic router HTTPS certificate still invalid in Google Chrome.

I know others have had this invalid certificate issue in Chrome, but not in MS Edge or Firefox. Did submit to ASUS support asking if there will be a fix in the near future and the response was they don't know. Not sure if this was don't know when/if there will be a fix, or don't know what the certificate issue is....

 

[halilnevzat]

same