Retirement: Azure Load Balancer Inbound NAT rule V1 for Azure VMSS
· 5 min read
Microsoft is retiring Inbound NAT Pools for Azure Virtual Machine Scale Sets on 30 September 2027. This is the VMSS-specific part of Inbound NAT rule V1 on Azure Load Balancer.
That sounds narrow, but it matters if you still use load balancer frontend port ranges to reach scale set instances for SSH, RDP, or similar admin access. Microsoft also says you won't be able to create new Inbound NAT Pools from 15 November 2026.
The key point is simple: single VM Inbound NAT rule V1 isn't being retired. This change is only for the old VMSS pattern, and the replacement is Inbound NAT rule V2 that targets a backend pool instead.