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order |
This keyword specifies how host lookups are to be performed. It
should be followed by one or more lookup methods, separated by commas.
Valid methods are
bind, hosts, and nis.
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trim |
This keyword may be listed more than once. Each time it should be
followed by a list of domains, separated by colons (‘:’), semicolons
(‘;’) or commas (‘,’), with the leading dot. When set, the
resolv+ library will automatically trim the given domain name from the
end of any hostname resolved via DNS. This is intended for use with
local hosts and domains. (Related note: trim will not affect hostnames
gathered via NIS or the hosts file. Care should be taken to
ensure that the first hostname for each entry in the hosts file is
fully qualified or non-qualified, as appropriate for the local
installation.)
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multi |
Valid values are
on and off. If set to
on, the resolv+ library will return all valid addresses for a host that
appears in the
/etc/hosts file,
instead of only the first. This is
off by default, as it may cause a substantial performance loss at sites
with large hosts files.
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nospoof |
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Valid values are
on and off. If set to
on, the resolv+ library will attempt to prevent hostname spoofing to
enhance the security of
rlogin and rsh. It works as follows: after performing a host address lookup, resolv+
will perform a hostname lookup for that address. If the two hostnames
do not match, the query will fail.
The default value is
off.
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spoofalert |
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Valid values are
on and off. If this option is set to
on and the
nospoof option is also set, resolv+ will log a warning of the error via the
syslog facility. The default value is
off.
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spoof |
Valid values are
off, nowarn and warn. If this option is set to
off, spoofed addresses are permitted and no warnings will be emitted
via the syslog facility.
If this option is set to
warn, resolv+ will attempt to prevent hostname spoofing to
enhance the security and log a warning of the error via the syslog
facility.
If this option is set to
nowarn, the resolv+ library will attempt to prevent hostname spoofing to
enhance the security but not emit warnings via the syslog facility.
Setting this option to anything else is equal to setting it to
nowarn.
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reorder |
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Valid values are
on and off. If set to
on, resolv+ will attempt to reorder host addresses so that local addresses
(i.e., on the same subnet) are listed first when a
gethostbyname(3)
is performed. Reordering is done for all lookup methods. The default
value is
off.
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