Thanks, Hari! We do have IP restrictions available, documented here.
For more advanced networking capabilities, you won't find those on the Consumption plan, but they are available on the Functions Premium plan and with App Service plan hosting.
As for DDoS, there are some good answers in the Azure Security Whitepaper. In short, there are some things at the Azure level for sure (Basic protection), but that's for a more general level of protection and doesn't make any guarantees about your workload specifically. Your app could still certainly be the target of a DDoS and be taken down unless you take mitigating actions. The best practices outlined in that whitepaper are a great place to start. I would also take a look at the Standard protection offerings as well, but I don't know as much about those, personally.
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Thanks, Hari! We do have IP restrictions available, documented here.
For more advanced networking capabilities, you won't find those on the Consumption plan, but they are available on the Functions Premium plan and with App Service plan hosting.
As for DDoS, there are some good answers in the Azure Security Whitepaper. In short, there are some things at the Azure level for sure (Basic protection), but that's for a more general level of protection and doesn't make any guarantees about your workload specifically. Your app could still certainly be the target of a DDoS and be taken down unless you take mitigating actions. The best practices outlined in that whitepaper are a great place to start. I would also take a look at the Standard protection offerings as well, but I don't know as much about those, personally.