GPO policy: "Configure RPC listener settings" — protocols sub-option, under Computer Configuration
Administrative Templates > Printers. Controls which transport protocols incoming RPC connections to the print spooler are allowed to use. Default (when unconfigured) is RPC over TCP only. Registry: HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Printers\RPC:RpcProtocols (REG_DWORD). Reference: Policy CSP - Printers (ConfigureRpcListenerSettings)
Values
| Enum Value | Description |
|---|---|
|
|
RPC over named pipes only (registry value 1). Incoming print spooler RPC connections are restricted to named-pipe transport. Requires additional firewall configuration. |
|
|
RPC over TCP only (registry value 2, default). Incoming print spooler RPC connections are restricted to TCP transport. Recommended since Windows 11 22H2. |
|
|
RPC over named pipes and TCP (registry value 5 / 0x7 bitmask with TCP+NP). Incoming print spooler RPC connections are accepted over both TCP and named-pipe transports. |
Used by
ComputerAdministrativeTemplatestype: Computer-specific Administrative Templates (ADMX) settings on an Endpoint.
Example
Example
"RPC_OVER_NAMED_PIPES"