Configuring the Point-to-Point Protocol (PPP)

Complex PPP connection scenarios

Many networking scenarios use PPP to connect two hosts via modems or a dedicated serial line. While these scenarios may require some effort to achieve a successful connection, they are simple in that they only involve configuration of one connection. This section provides a description of two more complex scenarios that require multiple connections, including one or more PPP links, to resolve the scenario's networking needs.

PPP gateway scenario

The first complex connection scenario is illustrated by ``PPP gateway scenario''.

PPP gateway scenario

The requirements of this scenario are that host A needs to access the Internet but has no direct access. To gain Internet access, host A must use PPP to connect to host B, which does have Internet access. Host B must act as a gateway to the Internet for host A. This scenario requires that:

PPP server scenario

The second complex connection scenario is illustrated by ``PPP server scenario''.

PPP server scenario

The requirements of this scenario are for a single host to act as a PPP server. Multiple hosts connect to this server using PPP, and the server provides services (such as Internet access) to these hosts over the PPP connections. There are two special configuration issues for a PPP server:

A configuration decision is whether this address (and the unique IP address by which the server will know the client) will be assigned by the server or by each client.

NOTE: The following configuration requirements apply only to the server configuration. Since the clients may be running a non-SCO PPP implementation, no assumptions are made about the clients' configurations.

If the server assigns addresses, this requires the following server configuration:

If the clients assign addresses, this requires the following configuration:

NOTE: It is possible for two or more clients to log in using the same login account. This makes configuration simpler by requiring fewer PPP login accounts.

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SCO OpenServer Release 5.0.7 -- 11 February 2003