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Title
When connecting to a RDP Remote Desktop Session an error message is produced "Because of a protocol error detected at the client (code 0x2104), this session will be disconnected." -
Description
When connecting to a RDP Remote Desktop Session from the Desktop Client or Web Client, an error message is produced "Because of a protocol error detected at the client (code 0x2104), this session will be disconnected. Please try connecting to the remote computer again." -
Cause
Port 3389 may be blocked between Client and SPS or between SPS network port and the destination server. -
Resolution
From Client machine:
- Test using Telnet to verify access to the RDP port specified in SPS connection policy
# telnet {SPS IP} {Port}From SPS appliance:
- Go to Basic Settings > Troubleshooting > Connect to TCP port
Test to verify that the SPS appliance has access to the RDP port 3389 against the target server
Make sure this is successful from each SPS appliance that will service the RDP sessions.If the Telnet test does fail, network routes will need to be investigated within the network infrastructure.