System information

PC-Duo Host Guide
74
If you check Use Encryption, data exchanged over remote control connections are
protected with an encryption algorithm negotiated with the client (see the “Selecting
ciphers” for more information about encryption).
NOTE: the Host can be installed on a computer that is also running the Gateway. Both
programs can have the IP protocol enabled, because they use different UDP ports (Host
uses 1505, Gateway uses 2303). However, the two programs must compete for a single
IPX port. Either disable (uncheck) IPX on the Protocols tab of the Host, or choose an
alternate port (other than Standard) for IPX in either the Host or the Gateway.
Select ciphers
When the Master or the Gateway requests a connection to the Host, the two applications
negotiate to determine the highest level of encryption that is supported by both. For
example, the Master 11.2 will try to use AES 256-bit encryption by default but a Host 11.0
might be configured to use Triple-DES; in that case, the two applications will agree to use
Triple DES).
NOTE: Older the Host versions up to 10.0 support only RC4. Newer versions starting
with 11.0 support Triple-DES and AES.
The Select Ciphers window lists the encryption ciphers that are supported by the Host in
decreasing order of preference. In the default configuration, this order always begins with
AES encryption with 256-bit keys.
Specific configurations can be disabled by moving them below the “DISABLED” line; in
that case, they will never be considered by the Host:
 To enable a cipher option, select it from the DISABLED list and move it to the
ENABLED list by clicking Up.
 To disable a cipher option, select it from the ENABLED list and move it to the
DISABLED list by clicking Down.
 Click OK.