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HOST.CONF !!!HOST.CONF NAME DESCRIPTION FILES SEE ALSO ---- !!NAME host.conf - resolver configuration file !!DESCRIPTION The file ''/etc/host.conf'' contains configuration information specific to the resolver library. It should contain one configuration keyword per line, followed by appropriate configuration information. The keywords recognized are ''order'', ''trim'', ''multi'', ''nospoof'' and ''reorder''. Each keyword is described seperately below. ''order'' This keyword specifies how host lookups are to be performed. It should be followed by one or more lookup methods, seperated by commas. Valid methods are ''bind'', ''hosts'' and ''nis''. ''trim'' This keyword may be listed more than once. Each time it should be followed by a single domain name, 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 host- names gathered via NIS or the hosts file. Care should be taken to insure that the first hostname for each entry in the hosts file is fully qualified or non-qualified, as appropriate for the local installation.) ''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. ''nospoof'' 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. ''spoofalert'' 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''. ''reorder'' 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''. !!FILES ''/etc/host.conf'' Resolver configuration file ''/etc/resolv.conf'' Resolver configuration file ''/etc/hosts'' Local hosts database !!SEE ALSO gethostbyname(3), hostname(7), resolv+(8), named(8) ----
3 pages link to
host.conf(5)
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Man5h
EnvironmentVariable
hosts(5)
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