Terminal Server's Three Levels of Security (186602)
The information in this article applies to:
- Microsoft Windows NT Server 4.0 Terminal Server Edition
This article was previously published under Q186602 SUMMARY
This article describes the three levels of security (High, Medium, Low)
available for a defined Terminal Server connection. Security levels are set
in Connection Configuration under Advanced Properties for the defined
connection.
MORE INFORMATION
Low Encryption:
Low encryption will encrypt only packets being sent from the client to the
server running Terminal Server. This "input only" encryption is to protect
the input of sensitive data like a user's password.
Medium Encryption:
Medium encryption will encrypt outgoing packets from the client the same as
Low-level encryption, but will also encrypt all display packets being
returned to the client from the server running Terminal Server. This method
of encryption will secure sensitive data as it travels over the network to
be displayed on a remote screen.
Both Low and Medium encryption use the RC4 algorithm with a 40-bit key.
High Encryption:
High encryption will encrypt packets in both directions, to and from the
client, but will use the industry standard RC4 encryption algorithm, again
with a 40-bit key. A non-export version of Windows NT Terminal Server will
provide 128-bit high-level RC4 encryption.
| Modification Type: | Major | Last Reviewed: | 6/24/2004 |
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| Keywords: | kbinfo KB186602 |
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