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14 Tunneling
XPort Pro™ User Guide 128
SSL
UDP (available only in Connect Mode because it is a connectionless protocol).
AES encryption over UDP
Telnet
When setting AES encryption, both the encrypt key and the decrypt key must be
specified. The encrypt key is used for data sent out. The decrypt key is used for
receiving data. Both of the keys may be set to the same value.
For Connect Mode using UDP, the XPort Pro accepts packets from any device on the
network. It will send packets to the last device that sent it packets.
Note: The Local Port in Connect Mode is not the same port configured in Accept
Mode.
To ignore data sent to the XPort Pro, enable the blocking of serial data or network
data (or both).
The TCP keepalive time is the time in which probes are periodically sent to the other
end of the connection. This ensures the other side is still connected.
To configure SSH, the SSH client username must be configured. In Connect Mode,
the XPort Pro is the SSH client. Ensure the XPort Pro SSH client username is
configured on the remote SSH server before using it with the XPort Pro.
Connect Mode supports up to sixteen Hosts.
At least one Host is required to enable Connect Mode. The Host field contains all
the information necessary to connect to that host.
Connect Mode has six states:
Disabled (no connection)
Enabled (always makes a connection)
Active if it sees any character from the serial port
Active if it sees a specific (configurable) character from the serial port
Modem control signal
Modem emulation
For the “any character” or “specific character” connection states, the XPort Pro waits
and retries the connection if the connection cannot be made. Once it makes a
connection and then disconnects, it will not reconnect until it sees any character or
the start character again (depending on the configured setting).
Configure the Modem Control Asserted setting (for DSR or DTR) to start a Connect
Mode connection when the signal is asserted. The XPort Pro will try to make a
connection indefinitely. If the connection closes, it will not make another connection
unless the signal is asserted again.