Error code 0X1104

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Because of a protocol error, detected at the client (code 0x1104) this session will
be disconnected

Symptom: When attempting to access a remote computer using RDC, you may receive this message: "Because of a protocol error, detected at the client (code 0x1104) this session will be disconnected. Please try connecting to the remote computer again"

Case 1: The terminal server is running an application that using the same port as the TS.

Case 2: The server comes with two NICs and each of them has default gateway. That messes the routing table. No computer should have two default gates.

Case 3: The client has XP as Remote Host with DHCP setup. The remote client may receive this error when the Remote host IP changes.

Case 4: I had this problem when i moved a server from a location to another.
My 2003 server has got two NIC and i used one for the first location and the
other for the second location. When i tried to connect with RDP to this server i found this problem. Looking for a solution in Terminal Services Configuration, I've founded it
by authorizing the second Nic to be used for RDP.

Case 5: Some software may changes the port #. Please check this link: Can’t access TS with error code 0x1104

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