PPP
Point-to-Point Protocol (PPP) provides a secure and reliable mechanism to transport
multiprotocol datagrams over point-to-point links. It has been reliably used for many years
to transmit data from dialup clients across modem-based connections.NOTE Although the Security Appliance DHCP server operates with the PPPoE client, the
PPPoE client and the DHCP clients are mutually exclusive. Therefore, if you configure the
PPPoE client on the outside interface, the DHCP client functionality is automatically
disabled on that interface. Similarly, if you enable the DHCP client on the outside interface,
the PPPoE client is automatically disabled on the outside interface.
NOTE The Security Appliance’s PPPoE Client is not interoperable with failover, Layer
Two Tunneling Protocol (L2TP), or Point-to-Point Tunneling Protocol (PPTP).