PR_CONNECT_RESET_ERROR web surfing after #FG500E sw upgrade

Hello,

Thank you for the details provided. The error PR_CONNECT_RESET_ERROR typically indicates that connections are being reset, which can happen if SSL inspection or certificate handling has changed after the upgrade.

Here are a few steps to troubleshoot:

1. SSL/Deep Packet Inspection:
• Check if SSL deep inspection is enabled on the firewall policies. Sometimes after an upgrade, SSL inspection profiles might change or require reconfiguration.
• If SSL inspection is enabled, try switching to certificate inspection temporarily and see if the issue resolves.

2. Certificates:
• Ensure that the FortiGate's CA certificate is trusted by the client browsers. If not, try re-importing the CA certificate into the clients' trusted certificate store.

3. Review Logs:
• Review the logs on the FortiGate for any blocked sessions or reset connections. This will give insights into whether any policies are dropping or resetting the traffic.

4. AV/IPS Profiles:
• Check if there are any security profiles (AV, IPS) that might be causing traffic to be reset post-upgrade. You can disable these temporarily to isolate the issue.

If the problem persists, please can call us at the support line and create a ticket, "http://www.fortinet.com/support/contact_support.html"(Select your country from the link to see the regional support number), if you require immediate assistance and quote this ticket number or update this ticket.

Thanks,