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Managing Serial Networks Using UUCP and PPP in Oracle® Solaris 11.4

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Updated: November 2020
 
 

Specifying Information for Communicating With the Dial-In Server

To communicate with a dial-in server, you need to gather information about the server. Then edit a few files. Most significantly, you must configure the communications requirements of all dial-in servers that the dial-out system needs to call. You can specify options about a dial-in server, such as an ISP phone number, in the /etc/ppp/options.ttyname file. However, the optimum place to configure peer information is in /etc/ppp/peers/peer-name files.

/etc/ppp/peers/peer-name File


Note -  The /etc/ppp/peers/peer-name file is not needed on the dial-out system for Oracle Solaris PPP 4.0 to work correctly.

Use the /etc/ppp/peers/peer-name file to provide information for communicating with a particular peer. /etc/ppp/peers/peer-name allows ordinary users to invoke preselected privileged options that users are not allowed to set.

For example, a nonprivileged user cannot override the noauth option if noauth is specified in the /etc/ppp/peers/peer-name file. Suppose the user wants to set up a link to peerB, which does not provide authentication credentials. As superuser, you can create a /etc/ppp/peers/peerB file that includes the noauth option. noauth indicates that the local system does not authenticate calls from peerB.

The pppd daemon reads /etc/ppp/peers/peer-name when pppd encounters the following option:

call peer-name

You can create a /etc/ppp/peers/peer-name file for each target peer with which the dial-out system needs to communicate. This practice is particularly convenient for permitting ordinary users to invoke special dial-out links without needing root privileges.

    Typical options that you specify in /etc/ppp/peers/peer-name include the following:

  • user user-name

    Supply user-name to the dial-in server, as the login name of the dial-out system, when authenticating with PAP or CHAP.

  • remotename peer-name

    Use peer-name as the name of the dial-in system. remotename is used in conjunction with PAP or CHAP authentication when scanning the /etc/ppp/pap-secrets or /etc/ppp/chap-secrets files.

  • connect "chat chat_script..."

    Open communication to the dial-in server by using the instructions in the chat script.

  • noauth

    Do not authenticate the peer peer-name when initiating communications.

  • noipdefault

    Set the initial IP address that is used in negotiating with the peer to 0.0.0.0. Use noipdefault when setting up a link to most ISPs to help facilitate IPCP negotiation between the peers.

  • defaultroute

    Install a default IPv4 route when IP is established on the link.

See the pppd(8) man page for more options that might apply to a specific target peer.

/etc/ppp/peers/myisp.tmpl Template File

The /etc/ppp/peers/myisp.tmpl file contains helpful comments about the /etc/ppp/peers/peer-name file. The template concludes with common options that you might use for an /etc/ppp/peers/peer-name file:

connect "/usr/bin/chat -f /etc/ppp/myisp-chat" 
user myname             
remotename myisp        
noauth                 
noipdefault             
defaultroute            
updetach                
noccp

    Where:

  • connect "/usr/bin/chat -f /etc/ppp/myisp-chat" calls the peer by using the chat script /etc/ppp/myisp-chat.

  • user myname is the account name for the local system. myname is the name for this system in the peer's /etc/ppp/pap-secrets file.

  • remotename myisp recognizes myisp as the name of the peer in the local system's /etc/ppp/pap-secrets file.

  • noauth does not require calling peers to provide authentication credentials.

  • noipdefault does not use a default IP address for the local system.

  • defaultroute uses the default route that is assigned to the local system.

  • updetach logs errors in the PPP log files, rather than on the standard output.

  • noccp does not use CCP compression.

To use /etc/ppp/peers/myisp.tmpl at your site, rename /etc/ppp/peers/myisp.tmpl to /etc/ppp/peers/.peer-name. Replace peer-name with the name of the peer to be called. Then modify the file contents as needed by your site.

Where to Find Examples of the /etc/ppp/peers/peer-name Files