Keep getting intermittent certificate errors

[larrywa01]

 have an RV130W router, about 2.5 years old, last firmware update.

The main internet signal is passed through from my cable modem that is setup as passthrough.

Multiple times a day, I will hit various web pages and the page will tell me there is either a certificate error or a certificate problem. This happens on multiple machines, so it's not a machine issue. Also, if I take the cisco router out of the network and plug directly into the cable modem, I don't see these problems.

I do still see the problems even if I'm connected via hardwire to the Cisco router.

Any ideas on what I can check here?

Thanks!

[pieterh]

"the page will tell me there is either a certificate error or a certificate problem"

this is phrased incorrectly, it is your browser that gives you this message, not the web-page retrieved from the server.

check if you are using the same nameserver when using the Cisco as when using the connection direct to the modem

check your time-sync when using the cisco router

in your browser open the certificate details and look for hints why this is seen as a problem.

[Georg Pauwen]

Hello,

what browser (Chrome, IE) are you using, and do your machines have any security software running (and if so, which) ?

[larrywa01]

I use all browser types, Chrome, Edge, Firefox. Once I see that error in one browser, it shows in all browsers.

We use Windows Defender for anti-virus and log in to Azure Active Directory for authentication.

Thanks!

[Spooster IT Services]

Hi,

The issue is most probably due to time/clock mismatch. Please check time/clock on your all networking devices. Due to time/clock mismatch certificate is not getting authenticated by the web server.

Recommendation is that time/clock should be same and real-time in the network.

Further you can configure a NTP server in your network to avoid the issue.