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STATUS_RDP_PROTOCOL_ERROR
The RDP protocol stream was rejected
This status is specific to the Remote Desktop Protocol data stream. The connection reached an RDP component that parsed enough of the stream to decide that the peer sent invalid, unsupported, or inconsistent protocol data.
Focus on negotiation stage and intermediaries. TLS inspection, RD Gateway, load balancers, incompatible clients, corrupted virtual-channel data, or protocol-extension mismatch can all appear as a stream-level protocol error.
What to inspect
- Capture whether the disconnect occurs during connection sequence, security exchange, licensing, graphics negotiation, or later virtual-channel traffic.
- Compare direct connection with RD Gateway or brokered connection.
- Check client/server RDP versions and enabled security layers.
References
- Microsoft Open Specifications: MS-RDPBCGR
- Microsoft Open Specifications: MS-RDPBCGR introduction
- Microsoft: Remote Desktop Services overview
- Microsoft Open Specifications: NTSTATUS values
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