ypserv - YP server daemon
ypserv [-1] [-a aclfile] [-d] [-x]
ypserv is a fundamental part of the network information system called YP.
This server provides information from YP maps to the YP
clients on the
A YP map is stored on the server as a db(3) database. A
number of YP
maps are grouped together in a domain. ypserv determines
the domains it
serves by looking for a directory with the domain name in
YP hasn't been known for high security through the years.
years security has improved by restricting access to the
SunOS 4.1 has a new file occurred named /var/yp/securenet.
networks the server can assume is secure. For information
about the file
format, see securenet(5).
Before the author of this server had seen securenet(5) another format,
ypserv.acl(5), was implemented. This file format makes it
allow and deny hosts and networks access to the server.
This file can
have any name since it's given by the argument to -a (use
The file used can be reread by sending a SIGHUP to ypserv.
PID can be found in the file /var/run/ypserv.pid.
If a host isn't secure all queries to the server will result
If the file /var/yp/ypserv.log exists then messages will be
If a directory named the same as the system domainname exists in /var/yp
(i.e., the domainname is ``foo'' and the directory
then ypserv will be automatically started at boot time.
The options are as follows:
-1 Allow ypserv to answer old YP version 1 requests.
Don't use /var/yp/securenet. Use another file with
file format. For further information see
-d Use Internet Domain Name System. If a query to map
``hosts.byname'' or ``hosts.byaddr'' fails, make a
DNS query and
return the result if successful. Alternately, if
these maps were
built on the YP master using makedbm -b then DNS
queries will be
done without needing to specify -d.
-x Terminate the server after processing aclfile or
securenet(5), ypserv.acl(5), yp(8), ypbind(8)
Mats O Jansson <email@example.com>
OpenBSD 3.6 June 27, 1994
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