You have an Azure Front Door Premium profile AFD1 associated with a WAF policy WAF1. You need to apply a rate limit on incoming requests to AFD1. Solution: Create a custom rule in WAF1. Does this meet the requirement?

Yes, this solution meets the requirement. Azure Front Door Premium WAF policies support custom rules, including rate limiting rules. By creating a custom rule within WAF1, you can define criteria such as the number of requests allowed within a specific time period from a given IP address, and then specify an action like blocking or logging when the rate limit is exceeded. This directly applies a rate limit to traffic processed by AFD1.