How to manage suppliers' access to supplier portal When IP address allow listing is enabled

Summary:

Customer has IP address allow listing enabled and only the IP of customer's VPN is registered which is used by all the employees/users. However, the suppliers do note have access to that VPN and the customer deals with more than hundreds of suppliers. How can we ensure that those suppliers are able to use Oracle Fusion as well? Does the customer need to create SR and allow IPs of all hundreds of suppliers individually?

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