Establish an asynchronous connection with a remote system for use by the PPP (Point to Point Protocol) subsystem.
The pppdial command provides the capability to establish a connection with a remote system over an asynchronous device. It is used with the pppattachd daemon as the means for carrying out the dialog with modems and remote systems to the point where PPP frames should be sent. The pppdial command uses standard input (stdin) and standard output (stdout) as the devices over which the dialog occurs.
Errors and messages are logged using the syslog facility.
Item | Description |
---|---|
-d VerboseFile | Logs the chat activity to VerboseFile. If VerboseFile does not exist, the pppdial command creates it. If VerboseFile does exists, the pppdial command appends the output to the existing file. |
-f ChatFile | Specifies the file which contains the dialog that is to occur over the tty device. The content of ChatFile conforms to the syntax of the Basic Networking Utility (BNU)/UNIX to UNIX Copy Program (UUCP). |
-t TimeOut | Specifies the number of seconds to wait before timing out during the Expect phase of the chat activity. |
-v | Logs the chat activity using the syslog facility. |
This command returns the following exit values:
Item | Description |
---|---|
0 | Successful completion. |
!0 | An error occurred. |
Access Control: Any User
To establish a connection with a remote system, enter on the command line in one line:
/usr/sbin/pppattachd client ip /dev/tty0 connect "/usr/sbin/pppdial
-v -f /home/pppuser/dialer.file"
The ChatFile named /home/pppuser/dialer.file contains:
''
atdt4311088
CONNECT
\\d\\n
ogin
pppuser
ssword
pppuserpwd
with the following meaning:
'' Expect a nul string
atdt4311088 Send the modem the dial command
4311088 is the phone number to dial
CONNECT Expect connect from the modem
\\d\\n Delay for 1 second then send a new line
ogin Expect the string ogin
pppuser Send the string pppuser
pppuser is the user id on the remote system
ssword Expect the string ssword
pppuserpwd Send the string pppuserpwd
pppuserpwd is the password of the user pppuser on the
remote system
The remote system must have a user pppuser defined with a password pppuserpwd and a $HOME/.profile containing:
exec pppattachd server ip ipv6 2>/dev/null
This is a very simplistic example. The example requires that the PPP subsystem is running on both the client and server (or remote) system. The example requires that the client system have a modem defined on /dev/tty0. The ChatFile contains the number 4311088 to dial. The remote system must also have a user defined with a password and a .profile which starts a PPP attachment on the remote system. The device (/dev/tty0), phone number, user, user password and mechanism starting the PPP attachment are variable and should reflect the current values on the server system.
Item | Description |
---|---|
/usr/sbin/pppdial | Contains the pppdial command. |