What you’re seeing
- Chrome and Edge show "Your connection is not private" with errors such as NET::ERR_CERT_AUTHORITY_INVALID or NET::ERR_CERT_COMMON_NAME_INVALID.
- Firefox warns of a potential security risk before opening the page.
- The admin page for a printer, firewall, NAS or other device shows a certificate warning every time.
- Staff routinely click past the warning to get their work done.
Common causes
Every environment is different, but these are the causes our engineers find most often:
- The device or application uses a self-signed certificate that browsers have no reason to trust.
- The certificate was issued by an internal CA whose root isn't trusted on every computer.
- The name in the certificate doesn't match the address staff use, such as an IP address instead of a hostname.
- The certificate has expired, or lacks details modern browsers require, such as a subject alternative name.
- The website doesn't send its intermediate certificate, so browsers can't complete the chain of trust.
Why it matters
A warning on an internal site might seem harmless, but it teaches staff to ignore the one alert designed to protect them from impostor sites. That habit carries over to real phishing pages and network interception attacks. Connections that aren't properly trusted can also expose admin passwords for firewalls and storage devices. Security audits and cyber insurance reviews frequently flag untrusted internal certificates as a finding.
How AskTechGurus fixes it
Skip the trial and error. A certified engineer works on your actual system, finds the root cause, and fixes it properly.
Tell us what’s happening
Submit a ticket in about two minutes. Paste the error, describe what changed, and pick your tier. No charge to submit.
A certified engineer diagnoses it
A vetted, US-based systems engineer claims your ticket, usually within minutes during business hours, and investigates over a secure remote session you can watch and end at any time.
Fixed and verified with you
The engineer resolves the root cause and confirms with you that it’s working. You don’t just get a workaround, and you get a plain-English summary of what was wrong.
Pay only when it’s resolved
Fixed price from $99, invoiced only after you approve the fix. If it isn’t resolved, you don’t pay.
Frequently asked questions
If it's our own site, is the warning really a problem?
Yes. Even on internal sites, the warning means the browser can't confirm it's talking to the right system, and it trains staff to click through warnings that might be genuine.
Can devices like printers and firewalls use proper certificates?
Most business-grade devices can. The engineer checks what each device supports and confirms the approach with you before making changes.