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    Command:

    ypserv.conf

    
    
    

    DESCRIPTION

           ypserv.conf is an ASCII file which contains some options for ypserv. It
           also contains a list of rules for  special  host  and  map  access  for
           ypserv  and rpc.ypxfrd. This file will be read by ypserv and rpc.ypxfrd
           at startup, or when receiving a SIGHUP signal.
    
           There is one entry per line. If the line is a option line,  the  format
           is:
    
                  option: <argument>
    
           The line for an access rule has the format:
    
                  host:domain:map:security
    
           All  rules  are tried one by one. If no match is found, access to a map
           is allowed.
    
           Following options exist:
    
           files: 30
                  This option specifies, how many database files should be  cached
                  by  ypserv.   If 0 is specified, caching is disabled. Decreasing
                  this number is only possible, if ypserv is restarted.
    
           trusted_master: server
                  When a map is pushed to a slave, the slave normally only accepts
                  updates  to  existing  maps, and then only from the real master.
                  If this option is set on a slave server, new (not yet  existing)
                  maps  from the host server will be accepted. The default is that
                  no trusted master is set and new maps will not be accepted.
                  Example:
                  trusted_master: ypmaster.example.org
    
           slp: [yes|<no>|domain]
                  If this option is enabled and SLP support compiled in,  the  NIS
                  server  registers itself on a SLP server. If the variable is set
                  to domain, an attribute domain with a comma  seperated  list  of
                  supported  domainnames  is  set. Else this attribute will not be
                  set.
    
           xfr_check_port: [<yes>|no]
                  With this option enabled, the NIS master server has to run on  a
                  priviliged port (< 1024). The default is "yes" (enabled).
    
           The field descriptions for the access rule lines are:
    
           host   IP address. Wildcards are allowed.
                  Examples:
                  131.234. = 131.234.0.0/255.255.0.0
                  131.234.214.0/255.255.254.0
    
    
           You  can  add  /mangle:field to the none or port security keywords. The
           :field part is optional.  It  will  replace  field  number  field  (the
           default  is  2,  the password field of the passwd and shadow maps) with
           the value x for client requests from non-priviliged ports (>= 1024) for
           the  port  security keyword and in all cases for the none security key-
           word.
    
    
    

    FILES

           /etc/ypserv.conf
    
    
    

    SEE ALSO

           ypserv(8), rpc.ypxfrd(8)
    
    
    

    WARNINGS

           The access rules for special maps are no real improvement in  security,
           but they make the life a little bit harder for a potential hacker.
    
    
    

    BUGS

           Solaris  clients  don't use privileged ports. All security options that
           depend on privileged ports cause big problems on Solaris clients.
    
    
    

    AUTHOR

           Thorsten Kukuk <kukuk@suse.de>
    
    
    

    YP Server December 2003 YPSERV.CONF(5)

    
    
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