Overview

This article describes the procedure to run an SSL scan, which is required to troubleshoot communication issues between the agent device and cloud.

The sslscan command queries SSL/TLS services to determine the supported ciphers and protocols. For more information, see https://www.mankier.com/1/sslscan.

In addition to ping and telnet, this test is used to isolate the communication issue resulting from the following failures:

• Backups fail with “Server not reachable.”
• Backup failure with “SSL/certificate error while validating the cloud server.”
• SSL terminates the proxy that blocks the connection.

SSL scan

1.  Download SSLScan from link https://code.google.com/archive/p/ss...-win/downloads.
2. Unzip the archive.
3. Open the command prompt and navigate to the extracted openssl folder.
4. Run the scan comma
   
   nd as follows and redirect the output as described below:
   
   sslscan FQDN:Port > ssl_scan_output.txt
   
   In the above command:
   - FQDN can be the URL to the cloud
   - Port is the instance level port (443)
   - ssl_scan_output.txt is the text file to which the command output is directed. Redirect the command output to the following files:
   
   sslscan  phoenix.druva.com:443 > c:\sslscan.txt
   sslscan --no-failed phoenix.druva.com:443 > c:\sslscan2.txt
   
   
   Note: The output of the sslscan includes preferred ciphers of the SSL service and protocols.  To suppress the protocols and ciphers from appearing in the output use the --no-failed option in the command as follows.
   
   sslscan --no-failed phoenix.druva.com:443
   sslscan  phoenix.druva.com:443
   
   Successful output:
   
   
   
   Failed output:
   

5. Collect the output text files and send them to Druva Support for further analysis.