I'm in the process of setting up an Azure landing zone for workloads that need to comply with standards like PCI-DSS and DORA, and I'm really stuck on the hub topology issue. Should I be using separate hub VNets for production and non-production environments, or is it okay to use a single hub? For those working in highly regulated areas, does using a shared hub make achieving and *maintaining* compliance a lot harder, or can it be managed with the right controls? Microsoft's Cloud Adoption Framework mentions situations in regulated industries but doesn't detail network topology options enough for strict isolation needs. I'd love to hear what others are actually doing in production and if auditors have ever raised concerns about shared hub setups. What would you recommend?
6 Answers
From my experience, separate hubs make compliance less of a headache. For PCI assessments, the auditors tend to dig deeper into shared routing setups, questioning how they work. If something were to go wrong in non-production, it could impact production, which is why having distinct environments is vital. And if you can swing it, having the production hub in a separate Azure subscription adds clarity as well.
For compliance scenarios, keeping separate hubs is always my go-to. It eliminates any confusion on PCI scope and keeps everything tidy. Plus, having distinct environments reduces the risk of non-production activities accidentally affecting production workflows. Sure, a shared hub might seem like a cost-saver, but in the long run, it's easier during audits if the boundaries are clear. Auditors like simplicity and clarity, and separate hubs give that to them.
It’s crucial to separate hubs for production and non-production, especially when dealing with compliance like PCI-DSS and DORA. With PCI, having a shared hub can complicate your Cardholder Data Environment (CDE) scoping, which means that any system that can connect to your CDE might get dragged into your audit. Keeping separate hubs gives you a clear boundary to show auditors, plus it's easier to manage both technically and from a compliance perspective. For DORA, the focus is on operational resilience; if something fails in a shared hub, it could take down both environments. It's best to have separate hubs and even consider separate subscriptions when you can.
Great insights! I’m new to this compliance stuff. Are there any resources you recommend for diving deeper into architectural design for these frameworks?
I think it’s worth exploring how PCI and DORA design influence hub-and-spoke architectures!
I've always recommended separate hubs, particularly for PCI. Each compliance environment should ideally have its own firewall and physical separation. This way, there’s no ambiguity about where compliance begins and ends. It also keeps things straightforward for audits; the clearer the boundary, the less back-and-forth with auditors.
Yes, but once you start adding more hubs, it can get pricy. How do you manage governance and costs while keeping everything compliant?
Without a doubt, separate hubs are the way to go for PCI compliance! The added clarity during audits is worth the extra resources. If you can segregate each environment even further with distinct Azure subscriptions, do it. Makes it easier for everyone involved, especially during those assessments.
I always advocate for separate hubs when dealing with PCI. A shared hub can work with the right controls but can get confusing for the QSA during assessments. For DORA, you want to show that changes in non-prod won’t impact your regulated workloads, which is easier to demonstrate with separate infrastructure. Makes things much cleaner!
Are the benefits purely for audit ease, or do you see real security enhancements with separation?