Apache HTTP Server Version 1.3
Module mod_access
This module is contained in the mod_access.c
file, and
is compiled in by default. It provides access control based on client
hostname or IP address.
Syntax: allow from host host ...
Context: directory, .htaccess
Override: Limit
Status: Base
Module: mod_access
The allow directive affects which hosts can access a given directory.
Host is one of the following:
all
- All hosts are allowed access
- A (partial) domain-name
- Hosts whose names match, or end in, this string are allowed access.
- A full IP address
- An IP address of a host allowed access
- A partial IP address
- The first 1 to 3 bytes of an IP address, for subnet restriction.
- A network/netmask pair (Apache 1.3 and later)
- A network a.b.c.d, and a netmask w.x.y.z. For more fine-grained subnet
restriction. (i.e. 10.1.0.0/255.255.0.0)
- A network/nnn CIDR specification (Apache 1.3 and later)
- Similar to the previous case, except the netmask consists of nnn
high-order 1 bits. (i.e. 10.1.0.0/16 is the same as 10.1.0.0/255.255.0.0)
Example:
allow from .ncsa.uiuc.edu
All hosts in the specified domain are allowed access.
Note that this compares whole components; bar.edu
would not match foobar.edu
.
See also deny, order, and
BrowserMatch.
Syntax: allow from
env=variablename
Context: directory, .htaccess
Override: Limit
Status: Base
Module: mod_access
Compatibility: Apache 1.2 and above
The allow from env directive controls access to a directory by the
existence (or non-existence) of an environment variable.
Example:
BrowserMatch ^KnockKnock/2.0 let_me_in
<Directory /docroot>
order deny,allow
deny from all
allow from env=let_me_in
</Directory>
In this case browsers with the user-agent string KnockKnock/2.0 will
be allowed access, and all others will be denied.
See also deny from env
and order.
Syntax: deny from host host ...
Context: directory, .htaccess
Override: Limit
Status: Base
Module: mod_access
The deny directive affects which hosts can access a given directory.
Host is one of the following:
all
- all hosts are denied access
- A (partial) domain-name
- host whose name is, or ends in, this string are denied access.
- A full IP address
- An IP address of a host denied access
- A partial IP address
- The first 1 to 3 bytes of an IP address, for subnet restriction.
- A network/netmask pair (Apache 1.3 and later)
- A network a.b.c.d, and a netmask w.x.y.z. For more fine-grained subnet
restriction. (i.e. 10.1.0.0/255.255.0.0)
- A network/nnn CIDR specification (Apache 1.3 and later)
- Similar to the previous case, except the netmask consists of nnn
high-order 1 bits. (i.e. 10.1.0.0/16 is the same as 10.1.0.0/255.255.0.0)
Example:
deny from 16
All hosts in the specified network are denied access.
Note that this compares whole components; bar.edu
would not match foobar.edu
.
See also allow and order.
Syntax: deny from
env=variablename
Context: directory, .htaccess
Override: Limit
Status: Base
Module: mod_access
Compatibility: Apache 1.2 and above
The deny from env directive controls access to a directory by the
existence (or non-existence) of an environment variable.
Example:
BrowserMatch ^BadRobot/0.9 go_away
<Directory /docroot>
order allow,deny
allow from all
deny from env=go_away
</Directory>
In this case browsers with the user-agent string BadRobot/0.9 will
be denied access, and all others will be allowed.
See also allow from env
and order.
Syntax: order ordering
Default: order deny,allow
Context: directory, .htaccess
Override: Limit
Status: Base
Module: mod_access
The order directive controls the order in which allow and
deny directives are evaluated. Ordering is one
of
- deny,allow
- the deny directives are evaluated before the allow directives. (The
initial state is OK.)
- allow,deny
- the allow directives are evaluated before the deny directives. (The
initial state is FORBIDDEN.)
- mutual-failure
- Only those hosts which appear on the allow list and do not appear
on the deny list are granted access. (The initial state is irrelevant.)
Note that in all cases every allow
and deny
statement is evaluated, there is no "short-circuiting".
Example:
order deny,allow
deny from all
allow from .ncsa.uiuc.edu
Hosts in the ncsa.uiuc.edu domain are allowed access; all other hosts are
denied access.
Apache HTTP Server Version 1.3
Index Home