Silicon Graphics IRIS Workstation, User Manual

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Version 1.0
IRIS WORKSTATION GUIDE 137 Appendix I:
3. When a remote computer logs in, the login name that it uses must
appear in the USERFILE . There may be several lines with the same
login name but one of them must either have the name of the
remote system or must contain a null system name.
4. If the line matched (3.) contains a “c”, the remote machine is called
back before any transactions take place.
The line
u,m /usr/xyz
allows machine m to login with name u and request the transfer of files whose
names start with /usr/xyz . The line
you, /usr/you
allows the ordinary user you to issue commands for files whose name starts
with /usr/you . (This type restriction is seldom used.) The lines
u,m /usr/xyz /usr/spool
u, /usr/spool
allows any remote machine to login with name u . If its system name is not m ,
it can only ask to transfer files whose names start with /usr/spool . If it is system
m , it can send files from paths /usr/xyz as well as /usr/spool . The lines
root, /
, /usr
allow any user to transfer files beginning with /usr but the user with login root
can transfer any file. (Note that any file that is to be transferred must be
readable by anybody.)
Forwarding File
There are two files that allow restrictions to be placed on the forwarding
mechanism. The format of the entries in each file is the same,
system
or
system,user,user2,...
The file ORIGFILE ( /usr/lib/uucp/ORIGFILE ) restricts the access of systems that
are attempting to forward through the local system. The file contains the list of
systems (and users) for whom the local system is willing to forward. Each
entry refers to the system that was the source of the original job and not the
name of the last system to forward the file. The second file, FWDFILE
( /usr/lib/uucp/FWDFILE ), is a list of valid systems that a job can be forwarded to.
(It is not necessarily the name of the destination of a job, but merely the next
valid node.) This file will be a subset of the L.sys file and can be used to
prevent forwarding to systems that are very expensive to reach but to which