Azure App Service
Azure App Service is a service used to create and deploy scalable, mission-critical web apps.
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Could not establish trust relationship for the SSL/TLS secure channel with authority 'webservicename.hostname.int:9443'.
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Ankit Jain
0
Reputation points
- We have an azure web app, where we have hosted the web API(OS:Linux). One of the api is trying to access the web service. Given below deatils:
- Web service - "webservicename.hostname.int:9443"
- Hosted - On-prem windows server IIS
- VNet - Integrated with default subnet.
- Issue - when we call the web service via hosted web app, it is retuning response as 400 Error: Bad Request - "Could not establish trust relationship for the SSL/TLS secure channel with authority 'webservicename.hostname.int:9443'."
- The SSL trust certificate is a public .cer, which has been uploaded to web app > certificate.
- Now the issue is it is not always responding 400, sometime it is giving 200 OK. But most of the time, it is throwing 400 SSL issue
- Question is why it is behaving on and off response? and How to resolve this issue.
- See attached screenshot: Cipher logs.
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Laxman Reddy Revuri 800 Reputation points Microsoft Vendor2024-11-21T16:48:13.39+00:00 Hi @Ankit Jain
Thanks for the question and using MS Q&A platform.
Check Certificate Configuration:Ensure that the SSL certificate is correctly configured on the IIS server and that the certificate chain is complete. Use tools like SSL Labs to verify.
Implement Logging:
Enable detailed logging on both the Azure Web App and the IIS server to capture SSL handshake failures. This will help in identifying the root cause.
Monitor Network Performance:
Use network monitoring tools to check for latency or packet loss between the Azure environment and the on-premises server.
Verify SSL Certificate:
Confirm that the SSL certificate presented by the web service is valid and trusted. You can do this by reviewing the certificate details and ensuring it's issued by a trusted Certificate Authority (CA). If the certificate is expired or self-signed, it may cause validation issues.
Check the SSL Certificate Chain:
Ensure the SSL certificate includes the full certificate chain, including any intermediate certificates. If any intermediate certificates are missing, SSL validation might fail, causing intermittent issues.
Enable SSL Debugging:
Enable SSL debugging on your Azure Web App to gather more information about the SSL certificate validation process. To do this:
In the Azure portal, go to your Web App.
Under Configuration > General Settings, set the WEBSITE_HTTPLOGGING_ENABLED app setting to "1".
This will enable HTTP logging, including SSL debugging details, which can help diagnose any SSL-related issues.
I hope this information is helpful.
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