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System Administration Guide: Network Services
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Part I Network Services Topics

1.  Network Service (Overview)

2.  Managing Web Cache Servers

3.  Time-Related Services

Part II Accessing Network File Systems Topics

4.  Managing Network File Systems (Overview)

5.  Network File System Administration (Tasks)

6.  Accessing Network File Systems (Reference)

Part III SLP Topics

7.  SLP (Overview)

8.  Planning and Enabling SLP (Tasks)

9.  Administering SLP (Tasks)

10.  Incorporating Legacy Services

11.  SLP (Reference)

Part IV Mail Services Topics

12.  Mail Services (Overview)

13.  Mail Services (Tasks)

14.  Mail Services (Reference)

Part V Serial Networking Topics

15.  Solaris PPP 4.0 (Overview)

16.  Planning for the PPP Link (Tasks)

17.  Setting Up a Dial-up PPP Link (Tasks)

18.  Setting Up a Leased-Line PPP Link (Tasks)

19.  Setting Up PPP Authentication (Tasks)

20.  Setting Up a PPPoE Tunnel (Tasks)

21.  Fixing Common PPP Problems (Tasks)

22.  Solaris PPP 4.0 (Reference)

23.  Migrating From Asynchronous Solaris PPP to Solaris PPP 4.0 (Tasks)

24.  UUCP (Overview)

25.  Administering UUCP (Tasks)

UUCP Administration (Task Map)

Adding UUCP Logins

How to Add UUCP Logins

Starting UUCP

How to Start UUCP

uudemon.poll Shell Script

uudemon.hour Shell Script

uudemon.admin Shell Script

uudemon.cleanup Shell Script

Running UUCP Over TCP/IP

How to Activate UUCP for TCP/IP

UUCP Security and Maintenance

Setting Up UUCP Security

Regular UUCP Maintenance

Email for UUCP

UUCP Public Directory

Troubleshooting UUCP

How to Check for Faulty Modems or ACUs

How to Debug Transmissions

Checking the UUCP /etc/uucp/Systems File

Checking UUCP Error Messages

Checking Basic Information

26.  UUCP (Reference)

Part VI Working With Remote Systems Topics

27.  Working With Remote Systems (Overview)

28.  Administering the FTP Server (Tasks)

29.  Accessing Remote Systems (Tasks)

Part VII Monitoring Network Services Topics

30.  Monitoring Network Performance (Tasks)



UUCP Security and Maintenance

After you have set up UUCP, maintenance is straightforward. This section explains ongoing UUCP tasks that relate to security, maintenance, and troubleshooting.

Setting Up UUCP Security

The default /etc/uucp/Permissions file provides the maximum amount of security for your UUCP links. The default Permissions file contains no entries.

You can set additional parameters for each remote machine to define the following:

A typical Permissions entry follows:

MACHINE=datsun LOGNAME=Udatsun VALIDATE=datsun 

This entry allows files to be sent and be received to and from the “normal” UUCP directories, not from anywhere in the system. The entry also causes the UUCP user name to be validated at login time.

Regular UUCP Maintenance

UUCP does not require much maintenance. However, you must ensure that the crontab file is in place, as described in the section How to Start UUCP. Your concern should be the growth of mail files and the public directory.

Email for UUCP

All email messages that are generated by the UUCP programs and scripts are sent to the user ID uucp. If you do not log in frequently as that user, you might not realize that mail is accumulating and consuming disk space. To solve this problem, create an alias in /etc/mail/aliases and redirect that email either to root or to yourself and others who are responsible for maintaining UUCP. Remember to run the newaliases command after modifying the aliases file.

UUCP Public Directory

The directory /var/spool/uucppublic is the one place in every system to which UUCP by default is able to copy files. Every user has permission to change to /var/spool/uucppublic and read and write files in the directory. However, the directory's sticky bit is set, so the directory's mode is 01777. As a result, users cannot remove files that have been copied to it and that belong to uucp. Only you, as UUCP administrator logged in as root or uucp, can remove files from this directory. To prevent the uncontrolled accumulation of files in this directory, you should ensure that you remove files from it periodically.

If this maintenance is inconvenient for users, encourage them to use uuto and uupick rather than removing the sticky bit, which is set for security reasons. See the uuto(1C) man page for instructions for using uuto and uupick. You can also restrict the mode of the directory to only one group of people. If you do not want to risk someone filling your disk, you can even deny UUCP access to it.