Using the PPP Option to Configure Point-To-Point Protocol Connections
Use the PPP option to configure how the device handles Point-to-Point Protocol (PPP) connections. PPP encapsulation allows different Network Layer protocols to be multiplexed simultaneously over commonly used physical links. To establish a PPP connection, you configure each end of a PPP link by exchanging Link Control Protocol (LCP) packets. LCP is used to establish, configure, and test data-link options. These options include encapsulation format options, authentication of the peer on the link, handling of varying limits on sizes of packets, detecting a looped-back link and other common misconfiguration errors; determining when a link is functioning properly or failing; and terminating the link.
PPP allows for authentication during link establishment to permit or deny connection to a device. This authentication can be performed using either Password Authentication Protocol (PAP) or Challenge Handshake Authentication Protocol (CHAP). These authentication protocols are intended for use primarily by hosts and routers that connect to a network server through switched circuits or dial-up lines but can also be used with dedicated lines.
For an interface with PPP encapsulation, you must configure a PPP access profile and bind it to the interface. You create an access profile with a user-defined name that is unique on the SSG device. You can bind the same access profile to more than one interface, but only one profile can be assigned to an interface. A PPP access profile includes the following information:
- PPP profile name
- Auth local name
- Auth secret
- Auth type
- Passive mode chap
- Static IP
- Netmask
