ypserv.conf - configuration file for ypserv and rpc.ypxfrd
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 from ypserv and
rpc.ypxfrd by startup, or by arriving a SIGHUP signal.
There is one entry per line. If the line is a option line, the format
is:
option: [yes|no]
The line for a access rule has the format:
host:map:security:mangle[:field]
All rules are tried one by one. If no match is found, access to a map
is allowed.
Following options exist:
dns the NIS server will query the nameserver for hostnames, which
are not found in the hosts.* maps. The default is "no". You
could overwrite it with the "-dns" commandline option. A "no"
will not overwrite the "-dns" option.
sunos_kludge
This is not longer supported, since ypserv supports the most YP
version 1 functions.
xfr_check_port
With this option enabled, the NIS master server have to run on a
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
map name of the map, or asterisk for all maps.
security
one of none, port, deny, des:
none always allow access. Mangle the passwd field if so configured,
default is not.
port allow access if from port < 1024. Otherwise if mangle are not
set,
do not allow access. If mangle is set to "yes", allow access,
but mangle the passwd field.
deny deny access to this map.
des requires DES authentication. Not supported by most libc's in the
moment. You could mangle the passwd field if so configured,
default is not.
mangle possible values are "yes" or "no". If "yes", the field entry
will be mangled. Mangling means that the field is replaced by
'x' if the port check reveals the request originated from somebody
unpriviliged.
field Which field should be mangled. The default is the 2nd field.
/etc/ypserv.conf
ypserv(8), rpc.ypxfrd(8)
The access rules for special maps are no real improvement in security,
but it makes the life a little bit harder for potential hacker.
Solaris clients doesn't use privileged ports. All security options,
which depend on privileged ports, causes big problems on Solaris
clients.
Thorsten Kukuk <kukuk@suse.de>
NYS YP Server January 1999 YPSERV.CONF(5)
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