Answer
The HENNGE Customer Portal uses the Salesforce platform.
Therefore, the recommended browsers and the FQDNs/ports that need to be configured for authorization follow Salesforce specifications.
For detailed specifications, please refer to the URLs below.
- About supported browsers
Supported Browsers for Experience Cloud Sites (external link) - About FQDNs/ports that need to be configured for authorization
Salesforce Core Services - IP Addresses and Domains to Allow (external link)