Knowledgebase
Unable to connect to Windows telnet server
Posted by Van Glass on 30 June 2007 12:02 AM
The Windows telnet server by default is configured to only accept requests authenticated using NTLM. The Java and .NET libraries do not support NTLM authentication, therefore it is necessary to re-configure the telnet server to not require NTLM. This is discussed in the following article:

http://support.microsoft.com/kb/233069/EN-US/

Additionally, the Windows telnet server expects that all commands sent to the server be terminated with a CRLF (carriage-return line-feed). By default the .NET and Java classes terminate all commands send to the server with a basic LF (line-feed) per UNIX conventions. If you connect to a Windows server without changing your command terminator the server may not respond as it is waiting for a CRLF instead of a LF. To set your command terminator please see the TelnetSession.setCommandTerminator method in Java or TelnetSession.CommandTerminator property in .NET



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