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System Administration Guide, Volume 3

UUCP Databases

Before a machine can dial out over the PPP link, you must edit these files in its UUCP database:

Updating /etc/uucp/Devices for PPP

The /etc/uucp/Devices file must contain entries for every communications device that a particular host uses or must know about. For example, if a machine uses a US Robotics V.32bis modem as part of the PPP link, you should ensure that /etc/uucp/Devices has an entry similar to the following: 


# Use these if you have a USrobotics V.32bis modem on Port B.
ACUEC   cua/b - 9600 usrv32bis-ec
ACUEC   cua/b - 19200 usrv32bis-ec
ACUEC   cua/b - 38400 usrv32bis-ec

Be sure that the Devices file on each PPP endpoint machine has an entry describing its modem. For more information about /etc/uucp/Devices, refer to "UUCP /etc/uucp/Devices File".

Updating /etc/uucp/Dialers for PPP

The /etc/uucp/Dialers file must have an entry describing the conversation with the modem attached to your PPP endpoint machine. Here is a sample entry for a US Robotics V.32bis modem that is part of a PPP link: 


usrv32bis-ec =,-,  "" \dA\pT&FE1V1X1Q0S2=255S12=255&A1&H1&M5&B2\r\c OK\r 
\EATDT\T\r\c CONNECT\s14400/ARQ STTY=crtscts

The first parameter in the entry, usrv32bis, corresponds to the last parameter in the /etc/uucp/Devices file. The remainder of the entry describes the characters that the modem sends, those that it expects to receive, and so on. Table 27-5 defines the control codes used in the Dialers file.

Be sure that an entry is in the Dialers file for the modem attached to each dial-out endpoint on your link. If you are unsure of the correct conversation for a particular modem, refer to the System Administration Guide, Volume 1 and the operating manual for the modem.

Updating /etc/uucp/Systems for PPP

The /etc/uucp/Systems file contains entries for every machine to which the local host can dial out. Information in an entry might include the remote host's phone number, the line speed, and so on. Here is an example that host nomadb in Figure 23-1 might have for its dial-in server: 


nubian-ppp  Any ACUEC 38400 5551212 "" P_ZERO "" 
\r\n\c login:-\r\n\c-login:-\r\n\c-login:-
EOT-login: bnomad password: Secret-Password

The first field gives the server's host name, nubian-ppp, a value used by the asppp.cf file keyword peer_system_name. ACUEC and 38400 refer to the device and speed, and are used to select an entry from the /etc/uucp/Devices file. The remaining information includes the phone number of the machine that nomadb is to dial in to, the login name that nomadb is using to log in, and so on. "UUCP /etc/uucp/Systems File" fully defines the parameters you need to supply to the Systems file.

On each remote host in your configuration, you must add an entry for its dial-in server. You can have additional entries in the /etc/uucp/Systems file for other machines to which the host can dial out for UUCP communications and for other PPP dial-in servers.

If the dial-in server also directly dials out to remote hosts, you must add entries to its Systems file describing each of these remote hosts.