7: Tunneling
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, if the remote address or port is not configured, then the XPort AR accepts packets from any device on the network. It will send packets to the last device that sent it packets. As a result, it is advised to configure the remote address and port. When the remote port and station are configured, the XPort AR ignores date from other sources.
Note: The Local Port in Connect Mode is not the same port configured in Accept Mode.
To ignore data sent to the XPort AR, 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 AR is the SSH client. Ensure the XPort AR’s SSH client username is configured on the SSH server before using it with the XPort AR.
Connect Mode has five 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 emulation
For the “any character” or “specific character” connection states, the XPort AR 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 Active setting (for DSR or DTR) to start a Connect Mode connection when the signal is asserted. The XPort AR will indefinitely try to make a connection forever. If the connection closes, it will not make another connection unless the signal is asserted again.
Accept Mode
In Accept Mode, the XPort AR waits for a connection. The configurable local port is the port the remote device connects to for this connection. There is no remote port or address. The default local port is 10001 for serial port 1 and 10002 for serial port 2.
Accept Mode supports the following protocols:
SSH (the XPort AR is the server in Accept Mode). When using this protocol, the SSH server host keys and at least one SSH authorized user must be configured.
TCP
AES encryption over TCP
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