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Configuring outgoing PPP connections

Configuring network protocol parameters

Using the PPP Outgoing Connection Wizard, you can enter the following information to define how the IP network protocol will be configured for the PPP link:


Local address assigned by
Select Remote if the service provider assigns the IP address of your end of the link each time it is established. Select Local if the IP address for your end of the PPP link is defined locally. The service provider can override this if required.

Local IP address/host name
The IP address of the local end of the PPP link or a host name that is resolvable to an IP address.

Remote address assigned by
Select Remote if the service provider assigns the IP address of the remote end of the link each time it is established. Select Local if the IP address for the service provider's end of the PPP link is defined locally. The service provider can override this if required.

Remote IP address/host name
The IP address of the remote end of the PPP link or a host name that is resolvable to an IP address.

Use as default route
Select Yes if a default route to outside networks should be established in the routing table via the new PPP interface when the link is brought up. The route will also be deleted when the link is taken down again. Select No if the local host already has a network interface and you do not want this to stop being the default route.

Local host acts as gateway
Select Yes if the host at your end of the PPP link will act as a router for packets between the local network and the remote end of the link. Select No if you do not want the local machine to act as a router or it is not connected to a local network.

Act as proxy for ARP
Select Yes if the host at your end of the PPP link will act as a proxy for Address Resolution Protocol (ARP) requests on the local network on behalf of the host at the remote end of the link. This is necessary if the IP address and network mask of the remote end of the link defines it to be on the local network. Because the PPP interface of the machine at the remote end of the link does not have a hardware (MAC) address, it cannot answer ARP requests for this address from machines on the local network. The proxy machine must instead answer all ARP requests on behalf of the remote machine with its own MAC address. It examines the destination IP address of all network packets that are sent to its MAC address. If a packet's destination IP address is that of the machine at the remote end of a PPP link, it forwards the packet on the appropriate PPP interface.

Select No if the IP address and network mask of the host at the remote end of the link defines it as not being on a local network, or if there is no local network.


NOTE: If you require the PPP link to be brought up on demand, you must enter IP addresses in the local and remote address fields even if the service provider will override them during negotiation. Service providers will usually provide you with typical IP addresses that you should expect for each end of the link. If in doubt, leave the fields blank, configure the link to be brought up manually using pppattach, and use the command ppptalk status bundle tag to examine the IP addresses that are actually negotiated for the link. Then change the link to be brought up on demand, select remote address assignment, and enter the discovered addresses in the local and remote address fields. Although the service provider will probably override these addresses, they will provide enough information to allow the link to be brought up.


© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 22 April 2004