System Administration Guide: Resource Management and Network Services

Assigning Static IP Addresses to Callers

If your site implements PPP authentication, you can assign specific, static IP addresses to individual callers. In this scenario, every time a dial-out machine calls the dial-in server, the caller receives the same IP address.

You implement static addresses in either the pap-secrets or chap-secrets database. Here is a sample /etc/ppp/pap-secrets file with static IP addresses defined.

Caller 

Server 

Password 

IP Addresses 

joe

myserver

joepasswd

10.10.111.240 

sally

myserver

sallypasswd

10.10.111.241 

sue

myserver

suepasswd

10.10.111.242 

Here is a sample /etc/ppp/chap-secrets file that defines static IP addresses.

Caller 

Server 

CHAP secret 

IP Addresses 

account1

myserver

secret5748

10.10.111.244 

account2

myserver

secret91011

10.10.111.245