The problem
HTTPS issues on IIS commonly come from certificate binding, certificate chain, DNS or port 443 problems.
Recommended approach
Check the certificate, hostname binding and 443 listener in that order, then test the public endpoint.
Step-by-step checklist
- Confirm DNS points to the correct public IP.
- Confirm the certificate matches the hostname.
- Bind the certificate to the correct IIS site on 443.
- Check firewall/NAT for TCP 443.
- Test from an external network.
MY WAY IT SERVICES
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