Any possibility that Azure can change the SNAT ip in Default outbound?

Tanul 1,251 Reputation points


We have one old Basic type AKS cluster, created around 5 years back, and we are already planning to create a new one within 1 month.

We need to request one third party rest api and its team is asking for the IP which they can authorized for the request.

This basic AKS is using Default outbound access whose SNAT IP is dynamically assigned by Azure as mentioned here. We can share this IP but are there any chances that Azure modifies this IP unknowingly. Though it is dynamically assigned but till the time cluster is alive IP will not change right?

Am I correct. Kindly suggest?

Kind Regards,


Azure Virtual Network
Azure Virtual Network
An Azure networking service that is used to provision private networks and optionally to connect to on-premises datacenters.
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Azure Kubernetes Service (AKS)
Azure Kubernetes Service (AKS)
An Azure service that provides serverless Kubernetes, an integrated continuous integration and continuous delivery experience, and enterprise-grade security and governance.
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  1. ChaitanyaNaykodi-MSFT 24,486 Reputation points Microsoft Employee


    Thank you for reaching out.

    As documented here the default outbound access IP is implicit and belongs to Microsoft. This IP address is subject to change and it's not recommended to depend on it for production workloads.

    As customers don't own the default outbound access IP. This IP may change, and any dependency on it could cause issues in the future.

    Though it is dynamically assigned but till the time cluster is alive IP will not change right?

    As this is default outbound access IP, there is no guarantee that the IP address will remain the same.

    Hope this answers your question. Please let me know if you have any additional questions. Thank you!

    ​​Please "Accept the answer" if the information helped you. This will help us and others in the community as well.

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