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Always Allow is a bypass, not a remediation for a missing Deny deployment. Broadening it would reverse the intended protection across the enterprise.

NSG assignments do not create an AVNM deployment for a different VNet. A local workaround may leave the new workload outside centrally managed security policy and create inconsistent enforcement.

NIC NSGs are a separate downstream layer. AVNM admin rules are applied to VNets in selected network groups after regional deployment, so those dimensions must be checked first.

Adding a central Deny rule would impose another restriction and could worsen the spillover to subscriptions outside the authorized network group.

Inspecting traffic decision precedence might explain a block, but it cannot remove the unintended virtual networks from the central configuration scope.

Differentiating Allow from Always Allow explains packet evaluation, not why the same admin configuration reaches unintended virtual networks.

Always Allow bypasses later NSG evaluation and may be excessive for a request that requires centrally approved, scoped policy exception.

Tracing admin-rule precedence helps explain a current block but does not create or authorize an exception to the central isolation standard.

Adding a central Deny to already isolated groups would not create the narrowly approved application exception the team requested.

Assuming an AVNM rule caused the block before reading its effective action overlooks potential local NSG denies after a nonterminating admin Allow.

Allow versus Always Allow is important context, but without the applied rule and traffic tuple it does not identify this incident’s actual decision.

Checking network-group deployment scope helps determine which configurations are eligible to apply, but cannot alone identify the applied rule that ended this observed flow.

Source-address translation explains what a firewall sees after traffic reaches it; it does not force the branch-to-VNet flow through a secured hub.

Route association and propagation diagnostics are useful, but the missing security control is guaranteed inspection of the branch-to-spoke private traffic, not simply opening application ports.

Hub geography should be considered at design time but does not correct an active bypass around a configured hub security appliance.

Private routing intent directs eligible traffic through inspection but cannot create reachability to a subnet whose route is missing or not propagated.

Consistent security templates across branches do not replace diagnosis of why the specific prefix is absent from the hub connection’s effective route tables.

Changing inter-hub segmentation before identifying the missing route may add new restrictions without restoring the intended branch prefix.

Inter-hub rules help with selected flows, but the scenario calls for a managed baseline across the many added sites rather than an isolated exception.

Verifying one branch’s route table does not replace a consistent centrally managed security and connectivity baseline for many locations.

Inspecting effective routes is an important acceptance test, but by itself does not establish a repeatable shared security policy across all new branch sites.

Applying the same baseline to every branch is insufficient unless the specific disallowed interbranch path is routed to an enforcing rule.

Firewall source NAT affects address interpretation but does not by itself prevent the forbidden interbranch connection.

Examining propagation confirms a prefix is visible, but does not stop branch-to-branch access that routing currently permits.

Rechecking hub routing intent can prove that traffic traverses the firewall, but does not establish whether source NAT occurred on that path.

Inter-hub allow/deny design is a separate policy decision; it cannot explain why the firewall sees a different source than the branch client.

An effective route shows where traffic was forwarded, but not which translated source address an Azure Firewall rule ultimately matched.

Region selection is a capacity/location design decision, not proof that the newly created spoke route is inspected.

Writing an additional interbranch rule does not validate the recently deployed spoke’s unexpected bypass route.

Assuming SNAT explains the symptom is premature until the source-to-destination path is verified as passing through the firewall at all.

Troubleshooting missing route propagation after deployment cannot replace the required advance analysis of allowed processing and transit geography.

Inspecting existing routes can inform a design, but the new region requires a prospective topology and compliance assessment before committing hub placement.

Merely adding a secured hub cannot prove that all inspected routes and logging for the new region remain within approved geography.