The /usr/lib/uucp/.Admin/Foreign file lists access attempts by unknown systems. The /usr/lib/uucp/remote.unknown shell script appends an entry to the Foreign file each time a remote computer that is not listed in the local /usr/lib/uucp/Systems file attempts to communicate with that local system.
Someone with superuser authority can customize entries in the Foreign file to fit the needs of a specific site by modifying the remote.unknown shell script.
The following 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 /usr/lib/uucp/Systems file, attempted to log in on September 20 at 10:38 p.m., but the uucp program did not allow the unknown system to log in.
Commands: uucp(1), uudemon.cleanu(4), uux(1)
Daemons: cron(8), uucico(8), uuxqt(1) delim off