Appendix A[ 217 ]Directive Explanation Context/Default
alias Defines another name for
the location, as found on
the filesystem. If the location
is specified with a regular
expression, the alias should
reference captures defined
in that regular expression.Valid context:
location
Default value: -allow Allows access from this IP address,
network, or all.
Valid contexts: http,
server, location,
limit_except
Default value: -.ancient_browser Specifies one or more strings,
which if found in the User-Agent
header, will indicate that the
browser is considered ancient by
setting the $ancient_browser
variable to the ancient_
browser_value directive.Valid contexts: http,
server, location
Default value: -.ancientbrowser
value
The value to which the
$ancient_browser variable
will be set.Valid contexts: http,
server, location
Default value: 1.auth_basic Enables authentication using
HTTP Basic Authentication.
The parameter string is used as the
realm name. If the special value
off is used, this indicates that the
auth_basic value of the parent
configuration level is negated.
Valid contexts: http,
server, location,
limit_except
Default value: off.auth_basicuser
file
Indicates the location of a file of
username:password:comment
tuples used to authenticate
users. The password needs
to be encrypted with the crypt
algorithm. The comment is
optional.Valid contexts: http,
server, location,
limit_except
Default value: -auth_http This directive specifies the server
used for authenticating the POP3/
IMAP user.Valid contexts: mail,
server
Default value: -auth_http_header Sets an additional header (first
parameter) to the specified value
(second parameter).Valid contexts: mail,
server
Default value: -