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 that defines static IP addresses.
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 |