31.5 Requirements for Oracle HTTP Server, IHS, Apache v2 Web Servers

Access Manager HTML pages use UTF-8 encoding. If the AddDefaultCharset directive enables a character set other than UTF-8, Access Manager HTML pages are garbled.

Apache-based Web servers, including Apache, Oracle HTTP Server, and IBM HTTP Server (IHS) allow Administrators to specify a default character set for all HTML pages sent out using the AddDefaultCharset directive. This directive overrides any character specified by the application generating the HTML pages.

Oracle recommends that you specify the AddDefaultCharset directive in the Web server configuration file (httpd.conf) as follows to ensure the correct display of Access Manager HTML pages:

     AddDefaultCharset Off

See your Web server documentation for more information about this directive.

The following topics provide additional details you should be aware of:

31.5.1 Requirements for IHS2 Web Servers

This discussion identifies specific requirements for IHS v2 with Access Manager. With IHS v2, you do not compile any source code to get the binaries.

The following requirements apply to IHS v2 Web servers:

31.5.2 Requirements for Apache and IHS v2 Reverse Proxy Servers

The proxy_module implements a proxy/gateway. The client requires no special configuration. Although the proxy_module can be used to implement a proxy capability for FTP, CONNECT (for SSL), HTTP/0.9, HTTP/1.0, and HTTP/1.1, only the reverse proxy capability is supported with certain Access Manager Apache and IHS v2 Webgates.

For Apache Web Servers: To use reverse proxy functions with Access Manager, you need to include the proxy module in the configure command. For example:

--enable-proxy: Apache proxy module --enable-proxy-connect: Apache proxy CONNECT module

--enable-proxy-ftp: Apache proxy FTP module

--enable-proxy-http: Apache proxy HTTP module

You also need to load mod_proxy and the mod_proxy_http module into the server dynamically. A reverse proxy is activated using the ProxyPass directive or the [P] flag to the RewriteRule directive.

For IHS Web Servers: After installing the IHS Web server, reverse proxy configurations must be completed in the httpd.conf file in the following directory:

IHS_install_dir/conf directory

For more information, see "Activating Reverse Proxy for Apache v2 and IHS v2".

31.5.3 Requirements for Apache v2 Web Servers

This discussion identifies specific requirements for Apache v2 with Access Manager.

Additional information can be found in your Apache documentation:

PATH Variable: On UNIX systems, your PATH variable must contain the gcc location before you compile Apache v2. However, the Sun C compiler location must not be in your PATH variable. On Windows systems, Apache can be built using either command-line tools or the Visual Studio IDE Workbench. The command-line build requires that the environment reflect the PATH, INCLUDE, LIB and other variables that can be configured with the vcvars32 batch file.

Multi-Process Module (MPM): With Apache v2, a default MPM is provided for each platform to bind network ports on the computer and to accept and process requests. Apache must have one, and only one, MPM in use at any time. If no MPM is selected during compilation, the default will be loaded into the Web server. You may activate the MPM during compilation.

mod_ssl: Access Manager supports Apache with or without SSL-capable communication. The base Apache Web server does not use SSL for browser connections and will not respond to HTTPS requests. For SSL-capable communication, Access Manager supports Apache with mod_ssl only. No SSL-specific Access Manager features operate with Apache-SSL.

mod_ssl relies on OpenSSL to provide the cryptography engine; mod_ssl provides an interface to the OpenSSL library. The OpenSSL library provides Strong Encryption using the Secure Sockets Layer and Transport Layer Security protocols.

With previous versions of Apache, the mod_ssl module had to be downloaded separately and compiled into the server. With Apache HTTP Server v2 module, mod_ssl comes as a loadable module that you can enable during configuration.

Multi-threading: Multi-threading is required for installations with Apache v1.3.27 or later.

Dynamic Shared Object (DSO): DSO support is required for Webgate. Apache modules that extend basic core server functionality may be either statically compiled for permanent inclusion in the Apache binary, or dynamically compiled and stored separately to load at runtime without recompiling. With Apache v1.3, mod_so had to be compiled. With Apache v2 on Windows systems, mod_so is a Base module and always included. With Apache v2 on UNIX, the loaded code typically comes from shared object files.


Dynamically loaded Apache 1.3 modules cannot be used directly with Apache v2. Apache v1.3 modules must be modified to load dynamically or compile into Apache v2.

mod_perl: mod_perl embeds the Perl programming language in the Apache Web server. Without Perl, Apache v2 can still be built and installed; however, some support scripts written in Perl cannot be used.


With Apache v.1.3.2x, some operating systems required additional options during configuration. However, to build Apache v2, there is no need to set any additional variables.