hosts.equiv man page on Ultrix

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hosts.equiv(5)							hosts.equiv(5)

       hosts.equiv - list of trusted hosts

       The file resides in the directory and contains a list of trusted hosts.
       When an or request from a host listed in the file is made, and the ini‐
       tiator  of the request has an entry in further validity checking is not
       required.  Thus, does not prompt for a password, and completes success‐
       fully.	When  a remote user is in the local file, that user is defined
       as equivalenced to a local user with the same user ID.

       The format of is a list of names, as in:

       A line consisting of a host name means that anyone logging in from that
       host  is trusted.  A line consisting of a host name preceded by - means
       that anyone logging in from that host is not trusted.  A line  consist‐
       ing  of	a  single  + means that all hosts are trusted.	Placing a line
       consisting of a single + in your file poses substantial security	 risks
       and is not recommended.

       The  +@	and  -@ syntax are specific to Yellow Pages (YP).  A line con‐
       sisting of +@group means that all hosts in that network group (which is
       served  by  YP)	are  trusted.  A line consisting of -@group means that
       hosts in that network group (which is served by YP)  are	 not  trusted.
       Programs	 scan  the  file sequentially and stop when they encounter the
       appropriate entry (either positive for host name	 and  +@  entries,  or
       negative for -@ entries).

       The  file has the same format as the file.  When a user executes or the
       file from that user's home directory is concatenated onto the file  for
       permission  checking.   The  host  names	 listed	 in  the and files may
       optionally contain the local BIND domain name.  For more information on
       BIND,  see the Guide to the BIND/Hesiod Service.	 If a user is excluded
       by a minus entry from but included in that user is considered  trusted.
       In the special case when the user is root, only the file is checked.

       It  is  possible	 to  have  two entries on a single line.  Separate the
       entires with a space.  If the remote host is equivalenced by the	 first
       entry,  the  user  named	 by the second entry is allowed to specify any
       name to the option (provided that name is in the file).	For example:
       suez john
       This entry allows John to log in from suez.  The normal use would be to
       put  this entry in the file in the home directory for bill.  Then, John
       can log in as bill when coming from suez without	 having	 to  supply  a
       password.  The second entry can be a netgroup.  For example:
       +@group1 +@group2
       This  entry  allows  any user in group2 coming from a host in group1 to
       log in as anyone.


See Also
       rlogin(1c), rsh(1c), netgroup(5yp)
       Guide to the BIND/Hesiod Service
       Guide to the Yellow Pages Service


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