The client cannot check OCSP or CRL for certificate status.
You might be connecting to vpn.company.com , but the certificate is issued to globalprotect.company.com .
If the browser shows a "Your connection is not private" warning, the issue is on the server side (expired cert) or a missing Root CA on your machine.
Several factors can contribute to the GlobalProtect VPN failed to verify certificate error: globalprotect vpn failed to verify certificate
"I think I know what might be causing the issue," Ryan said. "If your laptop's clock is not in sync with our servers, the certificate verification will fail."
Your device lacks the Root Certificate Authority (CA) that signed the VPN certificate.
The portal or gateway URL typed into the GlobalProtect client does not match the Common Name (CN) or Subject Alternative Name (SAN) specified in the certificate. The client cannot check OCSP or CRL for certificate status
Symptoms: certificate issuer not recognized; chain incomplete in browser. Fix:
Export the internal Root CA certificate from your firewall or PKI infrastructure.
Security tools like transparent proxies or web filters may intercept your traffic to scan for threats. These tools often swap the original VPN certificate with their own. GlobalProtect is generally "proxy-unaware" and will fail to verify these unexpected third-party certificates. Palo Alto Networks 4. Client-Side Discrepancies System Clock: Several factors can contribute to the GlobalProtect VPN
Standard uninstalls often leave registry keys or plist files behind.
Search for keywords like cert , failed , verification , or TLS .
Fixing the GlobalProtect VPN "Failed to Verify Certificate" Error: A Complete Guide