[WarmCurb]

The various Mac Forums I've tried have attempted to help (can post their solutions if needed), but none worked. My issue has to deal with DNS settings, I think.

The problem:

- Security Certificates: Pop up daily for Facebook mostly, but also Twitter. I will click Continue, which takes me to...
- 404 Error/Page Not Found Error: After the Certificate error mentioned above, this happens. Mostly to YouTube. It will stay like this for a few hours. I've cleared cache, rebooted, etc. etc. Nothing works.
- Images turn into little blue boxes with a question mark in them. **When this happens, it's an indication that a Certificate box will pop up out of the blue.
- Google.com (right now): Invalid URL

The requested URL "/", is invalid.
Reference #9.df260e6b.1336506889.420cf4f

So what can I do? It happens on both my Macbook Pro and iMac - both connected wirelessly to a Linksys router/cable modem.

[Headrush]

Maybe use /Application/Utilities/Keychain Access and remove any certificates for those web sites which are a problem.

You might want to use /Applications/Utilities/Terminal to do the following:

scutil --dns

Make sure your DNS server is right.

dscacheutil -flushcache

To clear out old and possibly modified DNS entries.

[WarmCurb]

Thanks. Will this help even if it happens in all browsers - Safari, Chrome and Firefox?

[WarmCurb]

In terminal, do I just type in "scutil --dns" and hit Enter?

[Headrush]

Originally Posted by WarmCurb

Thanks. Will this help even if it happens in all browsers - Safari, Chrome and Firefox?

Yes.

Originally Posted by WarmCurb

In terminal, do I just type in "scutil --dns" and hit Enter?

Yes.