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       hosts.hfaxd - HylaFAX client access control list


       The  ASCII  file etc/hosts.hfaxd in the HylaFAX spooling area specifies
       the hosts and users that are permitted to access services  through  the
       hfaxd(8) process.  This file must exist for client access; if it is not
       present then hfaxd will deny all requests for service.  Note also  that
       this  file  must  be readable only by the ``fax'' user; i.e.  it should
       have mode 600 and be owned by ``fax''.

       Each newline-terminated entry is a set of colon (:)  separated  fields,
       all  but  the  first  of  which are optional.  Trailing null fields and
       their separators may be omitted.  The most general form is:


       client  is  a  regular  expression  to  be  matched  against  a  string
       ``user@host''  that is formed from the user string passed to hfaxd with
       the USER command and the official  host  name  or  the  DARPA  Internet
       address,  specified in ``dot notation''.  If client does not contain an
       ``@'' then, for backwards compatibility, it is treated as  a  host  for
       which  any  user may have access; i.e. it is automatically converted to
       the regular expression ``^.*@client$''.

       Comments are introduced with the ``#'' character and extend to the  end
       of  the  line.   Any whitespace immediately preceding a comment is also

       If client has a leading ``!'', then it is interpreted  as  a  class  of
       hosts  and  users to which access is to be disallowed.  That is, if the
       pattern matches the client information, then access is denied.

       Note that regular expressions are not anchored.   That  is,  a  regular
       expression  may  match  a  substring of the ``user@host'' string.  Thus
       `pb@.*\.cl\.cam\.ac\.uk'   matches   `'.
       Use  ``^'' to match the start of the string and ``$'' to match the end.

       Fields following client are optional and specify the following:

       uid       The numerical user ID to assign to clients that use the entry
                 for  access.   hfaxd uses the uid to control access to server
                 resources such as jobs and documents (the value  is  used  to
                 set the group ID of files created by a client).

                 Multiple  clients/users  may share the same uid or unique IDs
                 may be created for each client.  User IDs may be  any  number
                 in  the  range [0..60002] with 60002 used, by convention, for
                 entries that do not have a uid specified.

       passwd    The encrypted password.  If this field is empty  (null)  then
                 no  password will be demanded when a client logs in; i.e. the
                 USER command does not need to be followed by a PASS  command.

       adminwd   The  encrypted  password for this user to gain administrative
                 privileges.  If this field is empty (null) then the  user  is
                 not permitted to have administrative privileges.


       The  following is a sample hosts.hfaxd file.  Note that the first entry
       that matches is taken, so more-specific entries should be placed first.
                                     # pb on a machine directly in can
                                     # administer if an admin pw is given
                  # anyone on local host uses the default uid
              ^sam@flake.*sgi\.com$  # Sam on his work machine
              ^sam@oxford.*Berkeley.*# Sam on any machine starting oxford and containing
                                     # Berkeley, e.g.
              ^.*@.*.\.esd\.         # anyone in an esd domain
              !^tom@                 # Tom Davis is denied access
              .*\.sgi\.com$          # but anyone else at sgi is ok


       sendfax(1), hfaxd(8), hylafax-server(5)

                               January 18, 1996