Incoming PPP Connections

Incoming PPP connections are connections where you can dial in to the Digi ConnectPort X device. You can connect to the Digi ConnectPort X device using a modem to dial the phone number of the modem connected to the serial port. For example, you can use a modem to access the network associated with the Digi device server or use modems to create a network bridge by connecting two separate networks.

• Authentication Configuration:

  • User Name: Specifies the user name for this connection. The user provides the user name and password when connecting to the device. This user name must be unique to the device so that no other incoming PPP connection, outgoing PPP connection, or system user uses it.
  • Password/Confirm Password: Specifies the password for this connection. This is the password that the user specifies when connecting and logging into the device.

  • Authentication: Specifies the type of authentication required by this PPP connection. You must supply the same type of authentication for your dial-up connection as specified here in order to successfully connect.

    NONE: No authentication is required. This is the recommended default for authentication.

    CHAP: CHAP (Challenge Handshake Authentication Protocol) provides secure encrypted authentication. CHAP periodically verifies the identity of the peer using a 3-way handshake. This is done upon initial link establishment and may be repeated anytime after the link has been established. (See RFC 1334 for further details.) CHAP authentication will work between two Digi ConnectPort X devices.

    Note Digi ConnectPort X does not support MS-CHAP (Microsoft specific implementation of CHAP).

    PAP: Many ISPs and corporate PPP servers use PAP (Password Authentication Protocol). PAP provides a simple method for the peer to establish its identity using a 2-way handshake. This is done only upon link establishment. (See RFC 1334 for further details.)

    BOTH: CHAP authentication will work between two Digi ConnectPort X products. CHAP will be negotiated to PAP for all other connections.

• Peer Configuration: Specifies how to assign the remote IP address that is supplied to the client.

  • Automatically assign remote IP address from IP address pool: Automatically assigns the remote IP address with a unique address from the IP address pool (as configured in Basic PPP Settings). The assigned address will not conflict with any other PPP connection using the Dynamic IP Address Pool.

    Note The Dynamic IP Address Pool must be enabled.

  • Allow remote peer to specify remote IP address: The remote peer automatically assigns the remote IP address.

  • Assign static remote IP address: Assigns the IP address entered in the Remote IP Address field to the remote IP address. This connection will always be assigned this same IP address. Use this option if the client needs to have the same IP address if it is running as a server.

  • Remote IP Address: Specifies the static remote IP address.
  • Allow client access to local network via PPP connection: Specifies whether the remote client should have access to the local Ethernet network when they dial in to the PPP connection. This option requires the Digi ConnectPort X device to have a unique local IP address for each PPP connection to handle the routing between the PPP connection and the local network.

  • Automatically assign local IP address from IP address pool: Automatically assigns the local IP address with a unique address from the IP address pool (as configured in Basic PPP Settings). The assigned address will not conflict with any other PPP connection using the Dynamic IP Address Pool.

    Note The Dynamic IP Address Pool must be enabled.

  • Assign static local IP address: Assigns the IP address entered in the Local IP Address field to the local IP address. This connection will always be assigned this same IP address. Use this option if the client needs to have the same IP address if it is running as a server.
  • Local IP Address: Specifies the local IP address to use for the PPP connection. This IP address must be unique on the network and must not be the same as the remote IP address or any address in the Dynamic IP Address Pool. Digi recommends that this address should reside on a different subnet than the Ethernet IP address.

• Advanced configuration: Specifies how to assign the remote IP address supplied to the client.

  Enable Idle Timeout: When selected, enables idle timeout for this connection. The idle time is the elapsed time after receiving the last byte from this connection. If you clear this check box, the connection can remain idle for any amount of time. If you select this check box, the connection closes after the connection has been idle for specified number of seconds in the Timeout field.

• Timeout: The maximum allowed time (in seconds) a connection can remain idle before it is closed.