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System Administration Guide: Resource Management and Network Services

Configuring the Dial-in Server

The tasks in this section are for configuring the dial-in server, the peer machine that receives the call over the PPP link from the dial-out machine. The tasks show how to configure the dial-in server myserver that was introduced in Figure 30–1.

Tasks for Configuring the Dial-in Server (Task Map)

Table 31–4 Task Map for Setting Up the Dial-in Server

Task 

Description 

For Instructions 

1. Gather preconfiguration information 

Gather data that is needed prior to setting up the link, such as peer host names, target phone numbers, and modem speed. 

Planning a Dial-up PPP Link

2. Configure the modem and serial port 

Set up the modem and serial port. 

How to Configure the Modem and Serial Port (Dial-in Server)

3. Configure calling peer information 

Set up the user environments and PPP options for every dial-out machine that is permitted to call the dial-in server. 

How to Configure Users of the Dial-in Server

4. Configure the serial line communication. 

Configure the characteristics of the transmission across the serial line. 

How to Define Communications Over the Serial Line (Dial-in Server)

Configuring Devices on the Dial-in Server

The following procedure explains how to configure the modem and serial port on the dial-in server.

Before you do the next procedure, you must have completed the following activities on the peer dial-in server:

How to Configure the Modem and Serial Port (Dial-in Server)

  1. Program the modem, as instructed in the modem manufacturer's documentation.

    For other suggestions, refer to How to Configure the Modem and Serial Port (Dial-out Machine).

  2. Attach the modem to the serial port on the dial-in server.

  3. Become superuser on the dial-in server.

  4. Configure the serial port by using admintool, as described in “Setting Up Terminals and Modems” in System Administration Guide: Advanced Administration.

    Use admintool to do the following:

    1. Select the serial port where you have attached the modem, either port a or port b.

      The Modify Serial Port window is displayed.

    2. Specify modem direction as dial-in only.

      Note –

      Solaris PPP 4.0 does support bidirectional communications for a modem.

    3. Click Okay to convey the changes.

How to Set the Modem Speed

The next procedure explains how to set the modem speed for a dial-in server. For suggestions on speeds to use with Sun Microsystems' computers, see Configuring the Modem Speed.

  1. Log in to the dial-in server.

  2. Use the tip command to reach the modem.

    Instructions for using tip to set the modem speed are in the tip(1) man page.

  3. Configure the modem for a fixed DTE rate.

  4. Lock the serial port to that rate, using ttymon or admintool, as discussed in “Setting Up Terminals and Modems” in System Administration Guide: Advanced Administration.

Where to Go From Here

Task 

For Instructions 

Configure another serial port and modem on the dial-in server 

How to Configure the Modem and Serial Port (Dial-in Server)

Configure information about users that call the dial-in server 

How to Configure Users of the Dial-in Server

Setting Up Users of the Dial-in Server

Part of the process of setting up a dial-in server involves configuring information about each known remote caller.

Before starting the procedures in this section, you must have done the following:

How to Configure Users of the Dial-in Server

  1. Become superuser on the dial-in server.

  2. Create a new account on the dial-in server for each remote PPP user.

    You can use admintool or the Solaris Management Console to create a new user. For instructions on creating a new user through Solaris Management Console, see “Setting Up User Accounts (Task Map)” in System Administration Guide: Basic Administration. For instructions on creating a new user through admintool, see admintool(1M).

    Note –

    The remaining steps show how to create an account by using admintool. You can use the same parameters for creating an account with Solaris Management Console.

  3. Use the Add User template to create the new user.

    For example, the next table shows how you might fill out PPP-related parameters for an account that is called pppuser for user1 on the dial-out machine myhome.

    Template Parameter 

    Value 

    Definition 

    User Name 

    pppuser

    The user account name for the remote user. This account name should correspond to the account name that is given in the login sequence of the chat script. For example, pppuser is the account name that is found in the chat script in How to Create the Instructions for Calling a Peer.

    Login Shell 

    /usr/bin/pppd

    The default login shell for the remote user. The login shell /usr/bin/pppd initially restricts the caller to a dedicated PPP environment.

    Create Home Dir Path 

    /export/home/pppuser

    The home directory /export/home/pppuser is set when the caller successfully logs in to the dial-in server.

  4. Create for each caller a $HOME/.ppprc file that contains various options that are specific to the user's PPP session.

    For example, you might create the following .ppprc file for pppuser.


    # cd /export/home/pppuser
# vi .ppprc
noccp

    noccp turns off compression control on the link.

Where to Go From Here

Task 

For Instructions 

Set up more users of the dial-in server 

How to Configure Users of the Dial-in Server

Configure communications over the dial-in server 

How to Define Communications Over the Serial Line (Dial-in Server)

Configuring Communications Over the Dial-in Server

The next task shows how to enable the dial-in server to open communications with any dial-out machine, based on options that are defined in the following PPP configuration files:

For detailed information about these files, refer to Using PPP Options in Files and on the Command Line.

Before you proceed, you should have done the following:

How to Define Communications Over the Serial Line (Dial-in Server)

  1. Become superuser on the dial-in server.

  2. Create the /etc/ppp/options file with the following entry.


    nodefaultroute

    nodefaultroute indicates that no route is defined for the server.

    Note –

    If the dial-in server does not have an /etc/ppp/options file, only the superuser can run the pppd command. However, the /etc/ppp/options file can be empty.

  3. Create the file /etc/options.ttyname to define how calls that are received over serial port ttyname should be handled.

    The following /etc/options.ttya file defines how the dial-in server's serial port /dev/ttya should handle incoming calls.


    :10.0.0.80
xonxoff

    :10.0.0.80

    Assigns the IP address 10.0.0.80 to all peers that are calling in over serial port ttya

    xonxoff

    Allows the serial line to handle communications from modems with software flow control enabled

Where to Go From Here

If you have followed all the procedures in this chapter, you have completed the configuration of the dial-up link.

Task 

For Instructions 

Test modem connectivity by dialing out to another computer 

cu(1C) andtip(1) man pages. These utilities can help you test if your modem is properly configured and can establish a connection with another machine.

Configure more options for the dial-in server 

Configuring the Dial-in Server

Configure more dial-out machines 

Configuring the Dial-out Machine

Have the remote machine call the dial-in server 

Calling the Dial-in Server