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 example of an /etc/ppp/pap-secrets file that defines static IP addresses.

joe    myserver  joepasswd   10.10.111.240
sally  myserver  sallypasswd 10.10.111.241
sue    myserver  suepasswd   10.10.111.242

Caller

joe, sally, and sue are the names of the authorized callers.

Server

myserver indicates the name of the server.

Password

joepasswd, sallypasswd, and suepasswd indicate the passwords for each caller.

IP Addresses

10.10.111.240 and 10.10.111.241 and 10.10.111.242 are the IP addresses assigned to each caller.

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

account1 myserver secret5748  10.10.111.244
account2 myserver secret91011 10.10.111.245

Caller

account1 and account2 indicate the names of the callers.

Server

myserver indicates the name of the server for each caller.

Password

secret5748 and secret91011 indicates the CHAP secret for each caller.

IP Addresses

10.10.111.244 and 10.10.111.245 are the IP addresses for each caller.