Unable to logon using terminal server connection

Posted by satch on Server Fault See other posts from Server Fault or by satch
Published on 2009-09-14T12:57:04Z Indexed on 2010/04/04 4:03 UTC
Read the original article Hit count: 372

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Windows

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terminal-server

I have several W2K3 SP2 servers, admin TS enabled. I discovered this morning, I was unable to logon into some of them. I've a couple of Citrix servers in different farms, a SAP (IA64) app server and a cvs server. All of them show same sympthoms; remote connections are refused. I've been able to logon locally, and terminal server service is up, there are no users (so connections are not depleted).

There are no errors in log in most servers. One of the Citrix ones, reported following errors:

Event ID 50

Source TermDD

Type Error

Description The RDP protocol component X.224 detected an error in the protocol stream and has disconnected the client.

and

Event ID 1006

Source TermService

Type Error

Description The terminal server received large number of incomplete connections. The system may be under attack.

Anyway, I suppose these errors appear because server isn't working, and Citrix users try to logon massively. (I nmap'ed server and port seems up).

I've solved this problem rebooting before, but with so many servers affected it seems like a crappy workaround. Any idea about troubleshooting it properly?

Thanks in advance

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