Here is a feature list offered by the pppdialin module. You control those feature either from one PPP account dialog or by setting the default in the policies section of the user account menu.
Enter in this section the parameters specific to the PPP protocol and session.
The current PPP account will inherit, field by field, the setting of this account. The effective value of each parameter is obtained by computing this inheritance. The default values (set in the default PPP parameters menu) are overridden by this "parent" account and then by the value entered in this account.
Same as the default.
Use this field to allocate a fixed IP. This is used generally for dedicated 24/7 link.
Same as default.
Same as default.
After some idle period, the PPP daemon may disconnect the link. You must specify this in seconds. 0 means that the feature is not used.
Same as default.
The PPP daemon has a very large option set. You may want to specify some here which are not handled by the dialog.
Enter here the path and argument of a command which will be executed once the connection is established. This is optional.
Enter here the path and argument of a command which will be executed after the connection has ended. This is optional.
Enter the name of a mail domain. Once the connection is established, the following command will be executed
/usr/sbin/sendmail -qRdomain
This is useful for non dedicated account where the client is running an smtp server.
You can setup static routes at connect time. You enter a list of network/netmask pairs. This is optional.
The PPP protocol may be used to carry IPX packets as well as IP packets. You control in this section the minimum IPX options needed.