Quotes around the URL are only needed when special characters are in the URL like "?"
xxx.xxx.xxx.xxx is the IP address of the server where the file is hosted.
/path/to/file.bcsi is the path and filename of the image
The use of HTTPS for the download URL will require ProxySG or ASG to know the certificate of that server. Specify the IP or URL that would be appropriate for the CN of the Certificate used. If the certificate has the IP address as the CN, then the URL must contain the IP address, or, if the certificate has the hostname as CN, then specify the hostname in the URL. For HTTP this does not matter. ProxySG and ASG already have the appropriate Certificates to Validate the URL link for the Symantec site.
Load the OS to the ProxySG or ASG using the HTTPS URL from FileConnect
Navigate to the ProxySG or ASG product and copy the Download URL location for the .bcsi file of the SGOS to upgrade or downgrade.
Note: The URL will be unique and temporary URL which has an expiration due to security hashes that change over time. Since this URL has special characters, it is necessary to use quotes around the URL when using the upgrade-path command.