version 2, including all changes.
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perry |
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HOST.CONF |
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!!!HOST.CONF |
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NAME |
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DESCRIPTION |
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FILES |
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SEE ALSO |
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---- |
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!!NAME |
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host.conf - resolver configuration file |
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!!DESCRIPTION |
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The file ''/etc/host.conf'' contains configuration |
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information specific to the resolver library. It should |
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contain one configuration keyword per line, followed by |
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appropriate configuration information. The keywords |
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recognized are ''order'', ''trim'', ''multi'', |
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''nospoof'' and ''reorder''. Each keyword is described |
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seperately below. |
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''order'' |
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This keyword specifies how host lookups are to be performed. |
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It should be followed by one or more lookup methods, |
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seperated by commas. Valid methods are ''bind'', |
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''hosts'' and ''nis''. |
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''trim'' |
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This keyword may be listed more than once. Each time it |
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should be followed by a single domain name, with the leading |
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dot. When set, the resolv+ library will automatically trim |
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the given domain name from the end of any hostname resolved |
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via DNS. This is intended for use with local hosts and |
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domains. (Related note: trim will not affect host- names |
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gathered via NIS or the hosts file. Care should be taken to |
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insure that the first hostname for each entry in the hosts |
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file is fully qualified or non-qualified, as appropriate for |
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the local installation.) |
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''multi'' |
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Valid values are ''on'' and ''off''. If set to |
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''on'', the resolv+ library will return all valid |
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addresses for a host that appears in the ''/etc/hosts'' |
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file, instead of only the first. This is ''off'' by |
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default, as it may cause a substantial performance loss at |
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sites with large hosts files. |
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''nospoof'' |
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Valid values are ''on'' and ''off''. If set to |
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''on'', the resolv+ library will attempt to prevent |
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hostname spoofing to enhance the security of __rlogin__ |
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and __rsh__. It works as follows: after performing a host |
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address lookup, resolv+ will perform a hostname lookup for |
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that address. If the two hostnames do not match, the query |
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will fail. |
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''spoofalert'' |
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If this option is set to ''on'' and the ''nospoof'' |
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option is also set, resolv+ will log a warning of the error |
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via the syslog facility. The default value is |
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''off''. |
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''reorder'' |
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Valid values are ''on'' and ''off''. If set to |
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''on'', resolv+ will attempt to reorder host addresses so |
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that local addresses (i.e., on the same subnet) are listed |
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first when a gethostbyname(3) is performed. |
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Reordering is done for all lookup methods. The default value |
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is ''off''. |
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!!FILES |
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''/etc/host.conf'' |
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Resolver configuration file |
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''/etc/resolv.conf'' |
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Resolver configuration file |
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''/etc/hosts'' |
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Local hosts database |
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!!SEE ALSO |
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gethostbyname(3), hostname(7), |
2 |
perry |
112 |
resolv+(8), named(8) |
1 |
perry |
113 |
---- |