Forum Discussion

BizTalkers's avatar
BizTalkers
Copper Contributor
Sep 29, 2025
Solved

Fixed ip address for outbound calls from Azure APIM Standard V2

Hi, I recently ran a PoC deployment of Azure APIM Standard V2 Sku instead of our current Premium Classic instance. This worked well! Performance is great and I am able to route calls to an on-prem n...
azure api management
  • Kidd_Ip's avatar
    Kidd_Ip
    Sep 30, 2025

    As of now, Azure API Management Standard V2 does not support fixed outbound IPs directly. Unlike Premium Classic, which offers dedicated IPs, Standard V2 relies on shared infrastructure and does not guarantee static outbound IPs for external calls.

     

    For youe case, tried using a NAT Gateway with a fixed IP on the same VNet but:

    • APIM Standard V2 does not route outbound traffic through NAT Gateway, even if it's in the same subnet.

     

    Suggestions:

    1. Use Azure Functions or App Service with NAT Gateway
    • Move outbound logic to a service that does support NAT Gateway, like:
      • Azure Functions (Premium Plan)
      • App Service (Premium V3)
    • These can be integrated with NAT Gateway to ensure fixed outbound IPs.
    • Then call these services from APIM.
    1. Use Azure Firewall or Custom Proxy
    • Deploy a proxy VM or container in the same VNet.
    • Route outbound traffic from APIM through this proxy.
    • The proxy uses NAT Gateway or public IP for outbound calls.
Kidd_Ip's avatar
Kidd_Ip
MVP
Sep 30, 2025

As of now, Azure API Management Standard V2 does not support fixed outbound IPs directly. Unlike Premium Classic, which offers dedicated IPs, Standard V2 relies on shared infrastructure and does not guarantee static outbound IPs for external calls.

 

For youe case, tried using a NAT Gateway with a fixed IP on the same VNet but:

  • APIM Standard V2 does not route outbound traffic through NAT Gateway, even if it's in the same subnet.

 

Suggestions:

  1. Use Azure Functions or App Service with NAT Gateway
  • Move outbound logic to a service that does support NAT Gateway, like:
    • Azure Functions (Premium Plan)
    • App Service (Premium V3)
  • These can be integrated with NAT Gateway to ensure fixed outbound IPs.
  • Then call these services from APIM.
  1. Use Azure Firewall or Custom Proxy
  • Deploy a proxy VM or container in the same VNet.
  • Route outbound traffic from APIM through this proxy.
  • The proxy uses NAT Gateway or public IP for outbound calls.

Resources