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====== Apache httpd ======

===== Known Issues =====

[[http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2014-October/024055.html|Problem]]: Apache fails  to do ''restart'', but succeeds if you do ''stop'' followed by ''start''.
<code>
# service httpd restart
Checking Apache 2.4 Web Server configuration.................................[ DONE ]
Stopping Apache 2.4 Web Server service.......................................[ DONE ]
Starting Apache 2.4 Web Server service.......................................[ FAIL ]
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:8080
(98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:8080
no listening sockets available, shutting down
AH00015: Unable to open logs
</code>

It's [[http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2014-October/024061.html|php]] [[http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2014-October/024062.html|session]] to blame, however, ''/etc/sysconfig/httpd'' has [[http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2014-October/024065.html|some]] [[http://git.pld-linux.org/?p=packages/apache.git;a=commitdiff;h=00ab488f59c5aacbcab9708a1c70b142520264d2|variable]] where you can adjust sleep between stop and start

You should try enabling and increasing it

===== Apache 2.4 =====

Apache 2.4 has landed in Th on June 7, 2013. See [[http://lists.pld-linux.org/mailman/pipermail/pld-devel-en/2013-June/023560.html|announcement]].

<note important>
**Access control incompatible changes**

All webapps have been migrated to new [[https://httpd.apache.org/docs/2.4/mod/mod_authz_host.html|mod_authz_host]] access syntax and usage of [[https://httpd.apache.org/docs/2.4/mod/mod_access_compat.html|mod_access_compat]] is strongly discouraged.
The rationale for it is that //access_compat// and //authz_host// are independent of each other and operate on separate namespaces. Main httpd configs contain only //authz_host// directives and enabling //access_compat// means allowing access to all locations/directories that are not explicitly denied by //authz_host//.

**Note:**
In case there exist both //authz_host// **and** //access_compat// directives for a location, the **Deny** clause of **ANY** of them takes precedence (in short: **deny** always wins, regardless where it comes from).
</note>

==== Upgrading ====

Detailed information about upgrading and all changes between apache 2.2 and 2.4 can be found [[https://httpd.apache.org/docs/2.4/upgrading.html|here]]

as for more complex examples, require ip or password:

<code apache Apache 2.x>
Order Deny,Allow
Deny from all

Allow from my.lan
Allow from 2001:1234:5678::/64

AuthType Basic
AuthName www.my.lan
AuthBasicProvider ldap
AuthLDAPURL "ldap://server:389/ou=People,dc=example,dc=com?uid?sub?(objectClass=*)"
Require valid-user

Satisfy Any
</code>

The solution is very simple, just list the requirements and 2.4 somehow magically knows what you mean:

<code apache Apache 2.4>
Require host my.lan
Require ip 2001:1234:5678::/64

AuthType Basic
AuthName www.my.lan
AuthBasicProvider ldap
AuthLDAPURL "ldap://server:389/ou=People,dc=example,dc=com?uid?sub?(objectClass=*)"

Require valid-user
</code>

Source: http://blog.hqcodeshop.fi/archives/63-Migrating-access-control-into-Apache-2.4.html

If you need to ''AND'' multiple requires, wrap them inside [[http://httpd.apache.org/docs/current/mod/mod_authz_core.html#requireall|<RequireAll></RequireAll>]]

===== Apache 2.2 and 2.4 compatible configs =====

If you need to support both Apache 2.2 and 2.4, then, for example, if Apache 2.2 config contained:

<code apache>
Allow from all
</code>

you need to use:

<code apache>
# Apache 2.x
<IfModule !mod_authz_core.c>
    Order allow,deny
    Allow from all
</IfModule>
# Apache 2.4
<IfModule mod_authz_core.c>
    Require all granted
</IfModule>
</code>
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