![]() I’ve noticed (and some other people also noticed) that when you add the VNET integration to the Azure Function (or web app), sometimes the NAT Gateway configuration is removed. The configuration is pretty simple – just requires the standard IP address and the VNET/Subnet associated. You can find more information about how to configure the NAT Gateway and associate it to a subnet here. A Virtual Network with at least one available subnet,.An Azure Function configured with an App Service plan that supports VNET integration (Premium Consumption, or one of the following dedicated plans: Standard, Premium V2 or Premium V3),. ![]() In order to implement this you will need the following items: ![]() So whatever incompatibility between the NAT Gateway and the App service plans are now solved! So let’s try to get it working… Pre-requisites To set it up, use VNet Integration, set integration subnet as subnet used with NAT Gateway, then enjoy. #AzureAppService Want a dedicated outbound address to the internet? Want to escape SNAT port restrictions? Now you can. Doing some research I found that the NAT Gateway at that point was not compatible with the basic load balancer and any products that used basic load balancer.īut just this week, the App Services team provided us with some good news: When I first learned about this resource around the end of 2019, I’ve tried to configure the following scenario:īut I got stuck on an issue – NAT Gateway were not compatible with the App Service Plans for either Azure Function Consumption Premium or Dedicated plans. Sounds like something we would like to do right? So, the NAT Gateways provides a way to specify a static IP addresses to be used as outbound address to any outbound traffic that is leaving a subnet towards the internet. NAT gateway resources specify which static IP addresses virtual machines use when creating outbound flows.” Designing virtual networks with NAT gateway resources NAT provides source network address translation (SNAT) for a subnet. The subnet of the virtual network states which NAT gateway will be used. “NAT gateway resources are part of Virtual Network NAT and provide outbound Internet connectivity for one or more subnets of a virtual network. I also had to change my design a bit, because API Management didn’t support one of the streaming requirements I had (but that is a story for another post).īut I wouldn’t be writing a post just to complain about this (not that this has never happened before) – I actually found another solution – one that I’ve tried and discarded earlier this year, but thanks to some good work from the App Services Engineering team, is finally a viable solution: Azure Functions + VNET Integration + NAT Gateways! How does it work? But in a couple of my last projects, Not only I needed to implement a new component (in this case API Management) just to fulfil this requirement. And both of them are valid options if you already have one of those components in place. In the past I had to use on of the subscription tiers from Azure API Management or in some cases deploy the code within a self hosted service in a Virtual Machine. ![]() “So to complete our configuration we just need your outbound static IP…” This is something that pops up again and again, specially if you work integrating legacy systems, like banks, government agencies or other older systems that requires a static IP Address to add to firewall inbound rules.
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