ypbind(8) BSD System Manager's Manual ypbind(8)
NAME
ypbind -- create and maintain a binding to a YP server
SYNOPSIS
ypbind [-ypset] [-ypsetme] [-insecure]
DESCRIPTION
ypbind finds the server for a particular YP domain and stores information
about it in a binding file. This binding information includes the IP
address of the server associated with that particular domain and which
port the server is using. This information is stored in the directory
/var/yp/binding in a file named with the convention DOMAINNAME.version.
(The YP system only supplies information on version 2.)
When ypbind starts the primary domain (or gets the first request for a
new domain), it checks if a file for the domain in question exists in the
directory /var/yp/binding (ie. /var/yp/binding/DOMAINNAME.ypservers). If
such a file exists, it will list the hosts which ypbind should restrict
its server search to. Otherwise, ypbind assumes it will need to use
broadcasts to find a valid server. Using either of these techniques,
ypbind will search for a server willing to serve maps for the client's
domain. Once a binding is established, ypbind maintains this binding by
periodically communicating with the server to which it is bound. If the
binding is somehow lost, e.g by server reboot, ypbind marks the domain as
unbound and attempts to re-establish the binding. When the binding is
once again successful, ypbind marks the domain as bound and resumes its
periodic check.
The options are as follows:
-ypset ypset(8) may be used to change the server to which a domain is
bound.
-ypsetme ypset(8) may be used only from this machine to change the
server to which a domain is bound.
-insecure
permit binding to a ypserv(8) on a non-reserved port. This is
needed if receiving maps from SunOS 3.x or Ultrix.
-d enable debugging output.
The -ypset and -ypsetme options are dangerous and should be avoided. For
greatest security, the use of a server list in
/var/yp/binding/DOMAINNAME.ypservers is recommended. The file should
contain a list of valid YP server hostnames, with one hostname per line.
The comment character is #.
FILES
/var/yp/binding/DOMAINNAME.version - binding file for domainname
/var/yp/binding/DOMAINNAME.ypservers - server list for this particular
domain
SEE ALSO
domainname(1), ypcat(1), ypmatch(1), yppoll(8), ypset(8), ypwhich(1),
ypserv(8), yp(8)
AUTHOR
Theo de Raadt
BSD October 25, 1994 BSD
Mac OS X 10.8 - Generated Tue Sep 4 20:45:02 CDT 2012