Whitelisting the IP address or generating a public key provides a layer of authentication. These cybersecurity techniques prevent anonymous or unknown disbursement requests and allow only verified requests. Your IP address needs to be whitelisted in the Cashfree Payments production server or it rejects all incoming requests. Note that only the production environment needs approval from Cashfree Payments and not for the test environment.
Follow the instructions below to whitelist your IP:
How to find my IP address?
Depending on your operating system, you can retrieve the IP of the system via multiple methods. You can also find your IP using helper sites such as https://whatismyipaddress.com/.