Logs contact attempts from unknown systems.
The /var/spool/uucp/.Admin/Foreign file lists access attempts by unknown systems. The /usr/sbin/uucp/remote.unknown shell script appends an entry to the Foreign file each time a remote computer that is not listed in the local /etc/uucp/Systems file attempts to communicate with that local system.
Someone with root user authority can customize entries in the Foreign file to fit the needs of a specific site by modifying the remote.unknown shell script.
This is a sample entry in the Foreign file:
Wed Sep 20 20:38:22 CDT 1989: call from the system merlin
System merlin, which is not listed in the /etc/uucp/Systems file, attempted to log in September 20 at 20:38 hours (10:38 p.m.). BNU did not allow the unknown system to log in.
This file is part of the Basic Networking Utilities Program (BNU) in BOS Extensions 1.
| /var/spool/uucp/.Admin/Foreign | Specifies the path of the Foreign file. |
| /etc/uucp/Permissions | Describes access permissions for remote systems. |
| /etc/uucp/Systems | Describes accessible remote systems. |
| /usr/sbin/uucp/remote.unknown | Records contacts from unknown systems in the Foreign file. |
| /var/spool/uucp/.Admin directory | Contains BNU administrative files. |
The uucp command, uudemon.cleanu command, uux command.
The cron daemon, uucico daemon, uuxqt daemon.
BNU File and Directory Structure and Maintaining BNU in AIX Version 4.3 System Management Guide: Communications and Networks.