route traffic to the internet in a virtual network over a fixed public IP

[Stefan Kießig]

Hello,

how can I route traffic to the internet in a virtual network over a fixed public IP.

For a service used over the internet, the traffice must come over a predefined public IP.

Greetings
Stefan

[#2]

The best way would be to use the third-party next-generation firewall with the static IP. you can get FortiGate, Paloalto, barracuda from the Azure marketplace. 

[#3]

Have you looked at the NAT gateway and an IP Prefix or Single IP allocation ?

https://docs.microsoft.com/en-us/azure/virtual-network/nat-overview