Next Previous Contents

2. Special accounts

Many user accounts are used to control specific tasks. These accounts are special purpose. They have a user ID and belong to a group. They also have a password. These accounts are not meant for human beings though.

2.1 Edit/Create PPP accounts via normal login

These accounts let a remote machine connect and establish a network connection using the PPP protocol. The remote system must identify itself using a standard chat sequence, sending its user name followed by a password.

2.2 PPP accounts via PAP authentication

These accounts are meant for authentication using the PAP protocol. The user name and password are exchanged using a special protocol defined in the PPP standard.

2.3 PPP accounts via CHAP authentication

Same as for the PPP accounts above, except that a different, more secure, protocol is used to exchange authentication.

2.4 SLIP accounts via normal login

SLIP is another way of establishing a network connection between two computers over a serial line (modem).

2.5 UUCP account

UUCP is the Unix to Unix Communication Protocol. This is a batch oriented data transfer. It allows unattended exchange of files (and email) between two computers. It provides a very inexpensive but highly reliable way to automate data exchange. It is probably the best way (by far) to receive and send email on the internet unless you have a dedicated connection with your service provider.

See the networking section of Linuxconf to configure UUCP.

2.6 POP accounts (mail only)

POP acccounts are restricted accounts. Users can't get a shell. They are generally used to retrieve email using the POP (Post Office Protocol). They can also be used to connect to other services such as Samba (file and print service for PCs machines).

2.7 Virtual POP accounts (mail only)

These accounts are even more restricted. They allow retrieval of email using the POP protocol, from virtual email domains. See the menu "Networking/mail delivery system (sendmail)" to configure virtual email domains.

Next Previous Contents