SLIP gateway scenario

The first complex connection scenario is illustrated by Figure 12-2, ``SLIP gateway scenario''.

Figure 12-2 SLIP gateway scenario

This scenario assumes that host A needs to access the Internet but has no direct access. To gain Internet access, host A must use SLIP to connect to host B, which does have Internet access. Host B must act as a gateway to the Internet for host A. The special configuration issues for this scenario are:

• A successful SLIP link must be established between host A and host B.

• Host B must be configured as a SLIP gateway.

• Host B may need to have proxy ARP entries for other hosts to be able to send packets to host A. See ``Proxy ARP''.
  

• Host A must have a default route in its IP routing table that points to the SLIP interface associated with the SLIP link to host B. To add such a default route, execute:
  
  route add default remote_IP_address 1

  remote_IP_address must be the same address used to identify the remote host when configuring the SLIP link. To find this address (if necessary) for an existing SLIP link, execute:
  
  ps -ef

  and find the entry for the slattach process for the link.