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1. Alternatively to replace Apache 2.2 with Apache 2.4, so that the paths and service commands work identically, you can use the IUS repository instead. Note: This method conflicts with the default CentOS Apache 2.2 packages and their dependencies. In addition you must run PHP through php-fpm service as modphp is not compatible. Please consider.
2. Each httpd module manages its own configuration, and each of its directives in httpd.conf specify one piece of configuration in a particular context. Httpd does not execute a command as it is read. At runtime, the core of httpd iterates over the defined configuration sections in the order described above to determine which ones apply to the.

Run-Time Configuration Changes

There have been significant changes in authorization configuration, and other minor configuration changes, that could require changes to your 2.2 configuration files before using them for 2.4.

Authorization

Any configuration file that uses authorization will likely need changes.

You should review the Authentication, Authorization and Access Control Howto, especially the section Beyond just authorization which explains the new mechanisms for controlling the order in which the authorization directives are applied.

Directives that control how authorization modules respond when they don't match the authenticated user have been removed: This includes AuthzLDAPAuthoritative, AuthzDBDAuthoritative, AuthzDBMAuthoritative, AuthzGroupFileAuthoritative, AuthzUserAuthoritative, and AuthzOwnerAuthoritative. These directives have been replaced by the more expressive RequireAny, RequireNone, and RequireAll.

If you use mod_authz_dbm, you must port your configuration to use Require dbm-group .. in place of Require group ...

Access control

In 2.2, access control based on client hostname, IP address, and other characteristics of client requests was done using the directives Order, Allow, Deny, and Satisfy.

In 2.4, such access control is done in the same way as other authorization checks, using the new module mod_authz_host. The old access control idioms should be replaced by the new authentication mechanisms, although for compatibility with old configurations, the new module mod_access_compat is provided.

Mixing old and new directives

Mixing old directives like Order, Allow or Deny with new ones like Require is technically possible but discouraged. mod_access_compat was created to support configurations containing only old directives to facilitate the 2.4 upgrade. Please check the examples below to get a better idea about issues that might arise.

Here are some examples of old and new ways to do the same access control.

Create zip file macbook. In this example, there is no authentication and all requests are denied.

Mac will not update. In this example, there is no authentication and all requests are allowed.

In the following example, there is no authentication and all hosts in the example.org domain are allowed access; all other hosts are denied access.

In the following example, mixing old and new directives leads to unexpected results.

Why httpd denies access to servers-status even if the configuration seems to allow it? Because mod_access_compat directives take precedence over the mod_authz_host one in this configuration merge scenario.

Apache Httpd 2.2.8 Exploit

This example conversely works as expected:

So even if mixing configuration is still possible, please try to avoid it when upgrading: either keep old directives and then migrate to the new ones on a later stage or just migrate everything in bulk.

In many configurations with authentication, where the value of the Satisfy was the default of ALL, snippets that simply disabled host-based access control are omitted:

In configurations where both authentication and access control were meaningfully combined, the access control directives should be migrated. Mojave vmware download. This example allows requests meeting both criteria:

In configurations where both authentication and access control were meaningfully combined, the access control directives should be migrated. This example allows requests meeting either criteria:

Other configuration changes

Apache Httpd 2.2.8 Ubuntu Dav/2 Vulnerability

Some other small adjustments may be necessary for particular configurations as discussed below.

• MaxRequestsPerChild has been renamed to MaxConnectionsPerChild, describes more accurately what it does. The old name is still supported.
• MaxClients has been renamed to MaxRequestWorkers, which describes more accurately what it does. For async MPMs, like event, the maximum number of clients is not equivalent than the number of worker threads. The old name is still supported.
• The DefaultType directive no longer has any effect, other than to emit a warning if it's used with any value other than none. You need to use other configuration settings to replace it in 2.4.
• AllowOverride now defaults to None.
• EnableSendfile now defaults to Off.
• FileETag now defaults to 'MTime Size' (without INode).
• mod_dav_fs: The format of the DavLockDB file has changed for systems with inodes. The old DavLockDB file must be deleted on upgrade.
• KeepAlive only accepts values of On or Off. Previously, any value other than 'Off' or '0' was treated as 'On'.
• Directives AcceptMutex, LockFile, RewriteLock, SSLMutex, SSLStaplingMutex, and WatchdogMutexPath have been replaced with a single Mutex directive. You will need to evaluate any use of these removed directives in your 2.2 configuration to determine if they can just be deleted or will need to be replaced using Mutex.
• mod_cache: CacheIgnoreURLSessionIdentifiers now does an exact match against the query string instead of a partial match. If your configuration was using partial strings, e.g. using sessionid to match /someapplication/image.gif;jsessionid=123456789, then you will need to change to the full string jsessionid.
• mod_cache: The second parameter to CacheEnable only matches forward proxy content if it begins with the correct protocol. In 2.2 and earlier, a parameter of '/' matched all content.
• mod_ldap: LDAPTrustedClientCert is now consistently a per-directory setting only. If you use this directive, review your configuration to make sure it is present in all the necessary directory contexts.
• mod_filter: FilterProvider syntax has changed and now uses a boolean expression to determine if a filter is applied.
• mod_include:
  • The #if expr element now uses the new expression parser. The old syntax can be restored with the new directive SSILegacyExprParser.
  • An SSI* config directive in directory scope no longer causes all other per-directory SSI* directives to be reset to their default values.
• mod_charset_lite: The DebugLevel option has been removed in favour of per-module LogLevel configuration.
• mod_ext_filter: The DebugLevel option has been removed in favour of per-module LogLevel configuration.
• mod_proxy_scgi: The default setting for PATH_INFO has changed from httpd 2.2, and some web applications will no longer operate properly with the new PATH_INFO setting. The previous setting can be restored by configuring the proxy-scgi-pathinfo variable.
• mod_ssl: CRL based revocation checking now needs to be explicitly configured through SSLCARevocationCheck.
• mod_substitute: The maximum line length is now limited to 1MB.
• mod_reqtimeout: If the module is loaded, it will now set some default timeouts.
• mod_dumpio: DumpIOLogLevel is no longer supported. Data is always logged at LogLeveltrace7.
• On Unix platforms, piped logging commands configured using either ErrorLog or CustomLog were invoked using /bin/sh -c in 2.2 and earlier. In 2.4 and later, piped logging commands are executed directly. To restore the old behaviour, see the piped logging documentation.