# Source and Destination Port No for communication with client API as needed for whitelisting

**URL:** <https://community.yellow.ai/t/source-and-destination-port-no-for-communication-with-client-api-as-needed-for-whitelisting/3824>\
**Category:** Studio\
**Tags:** builder\
**Created:** [March 3, 2023, 5:39am UTC](https://community.yellow.ai/t/source-and-destination-port-no-for-communication-with-client-api-as-needed-for-whitelisting/3824 "2023-03-03T05:39:42Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Meraj2002](https://avatars.discourse-cdn.com/v4/letter/m/9fc29f/32.png) [@Meraj2002](https://community.yellow.ai/u/Meraj2002)\
**Post date:** [March 3, 2023, 5:39am UTC](https://community.yellow.ai/t/source-and-destination-port-no-for-communication-with-client-api-as-needed-for-whitelisting/3824/1 "2023-03-03T05:39:43Z")

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I need to call the client API in our use case and for whitelisting I have shared our backened IP 13.71.49.46 with client.  
But the client network team is asking for Source and Destination Port No for communication. Can anyone help on this?