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Guide for HP-UX Webmin-based Admin A.1.070.08


Release Notes - What's New Overview - Modules included in HP-UX Webmin-based Admin Setup - Perl Requirement - Installation - Uninstallation - Browser Requirement - Javascript Event Handlers - Starting and Stopping Webmin - Automatic Restart at Boot-up Configuration - Default Configuration Values for Webmin - Changing Administrator's Password - Adding Modules to Webmin - HP-UX Tomcat-based Servlet Engine Module - Running Webmin under SSL - Changing the Default Look and Feel Using Themes - Enabling Internet site search from behind a firewall Administration of Apache - Identifying the Path to the Current Configuration Screen - Different levels of Apache configuration - Making changes to Apache configuration - Restart vs Stop and Start - Default Directive Values - SSL Configuration - Certificate and Key Management - Apache Configuration File Backup & Version Management - Mod_LDAP / Mod_Auth_LDAP Configuration - Edit Defined Parameters Support for HP-UX Internet Express Components - Integration - Administration Legal Notices Note: Please refer to the Webmin Software License located in /opt/hpws/LICENSES/webmin.


HP-UX Webmin-based Admin A.1.070.08: This release of HP-UX Webmin-based Admin is a security/bug fix release that addresses the following vulnerablilties: - corruption of the SSL virtual server configuration (JAGaf41910). This release also includes enhancements/bug fixes from A.1.070.01 - Disabled read access to module configuration for normal users - DOS attack(Locking out other users) when logging in using space in username - Support for 32-bit Apache (if installed) - Enhanced look and feel (new icons, intuitive forms, Javascript event handlers) - Backup, version management(RCS) and retrieval of Apache configuration files. (See below) - Direct access to launching HP-UX Tomcat-based Servlet Engine invoking Tomcat's Management and Admin tools (See below) - Consolidated log display page which now provides a single portal for viewing all log files. (See below) - Support for easy management of log rotation - Intuitive server status and info configuration and viewing - Enhanced certificate management including addition of PEM pass phrases to keys and deploying a key/certificate pair to a Virtual Server. (See below) - Support for Virtual Host additions and management - Improved parsing of Apache configuration files to accurately handle directives within Virtual Hosts, Directory, and other containers. - Various bug fixes


HP-UX Webmin-based Admin is a value-added version of Webmin provided by HP. Webmin is a web-based interface for system administration for Unix. Webmin consists of a miniserver, and a number of CGI programs which directly update system files like /etc/inetd.conf and /etc/passwd. The web server and all CGI programs are written in Perl version 5, and use no external modules. This means that you only need a Perl binary to run Webmin. For more information, see: Perl Requirement For more information: http://www.webmin.com/ User Guide: http://www.swelltech.com/support/webminguide/index.html "System Administration With Webmin, Apache Webserver"

Modules included in HP-UX Webmin-based Admin

HP-UX Webmin-based Admin has been customized to work with HP-UX Apache-based Web Server by excluding many of its standard modules. Modules included by HP-UX Webmin-based Admin: acl hpapache cpan lang man servers webmin webminlog Note: Although User & Groups (useradmin) module is shipped, it is not supported.


Perl Requirement

Webmin depends on Perl5 and expects it to be installed in /opt/perl/bin/perl. It is strongly recommended that you use Perl version 5.8.7, which can be obtained from HP Software Depot: http://software.hp.com/. Search for: Perl 5.8.7 To find out the location of the Perl you have, type the following command: % which perl To determine the version of Perl, type the following command: % </path/to/perl> -v To determine if the version of Perl is compatible with Webmin, as root, type: % /opt/hpws/webmin/perl-setup.sh If you have Perl installed on your machine in a location other than /opt/perl/bin/perl, you need to do the following steps: Before starting Webmin, run /opt/hpws/webmin/perl-setup.sh as root to make the necessary changes. This will ask for the full path to the Perl of your choice. It will check to make sure that your version of Perl is compliant, and then will update all Perl files with the verified location.


Information on installing all products of HP-UX Web Server Suite can be found in Getting Started The user configurable files of HP-UX Webmin-based Admin will be saved as per the standard HP-UX newconfig methodology. More information can be found in the newconfig section of Getting Started.


Uninstallation of HP-UX Webmin-based Admin may lead to inaccessibility of HP-UX Web Server Suite documentation by other components of the suite that may still be installed. To resolve this condition, please refer to the "Uninstallation" section in the following files (if existing): /opt/hpws/apache/hpws_docs/.hp_docs/README /opt/hpws/tomcat/hpws_docs/.hp_docs/README /opt/hpws/xmltools/hpws_docs/.hp_docs/README

Browser Requirement

Webmin is a GUI that is only accessible through a browser. It has been tested and works with the following browsers: Microsoft IE 5.x, Mozilla 1.0.1, Netscape 7.x

Javascript Event Handlers

onMouseOver: used to highlight selections and show default directive values onClick: used to simplify radio button input navigation There are some situations when Javascript event handlers can be disabled. In Apache, radio buttons with input boxes have been changed so they are automatically enabled when the user types in the corresponding input box. (Previously, you would have to click on the radio button and type in the corresponding box.) To disable, go to Admin Settings -> Webmin Configuration -> Webmin Themes When the current theme is set to HP-UX Web Server Suite Theme, you can 'Configure' the theme to Disable the Javascript event handlers. Please note that not all event handlers work for the all supported browsers.

Starting and Stopping Webmin

Webmin is not automatically started upon installation. For more information, see Automatic Starting Webmin at Reboot You must be root to start and stop the Webmin miniserver. (If you have problems starting Webmin, please see the "Perl Requirement" topic above.) To start Webmin: Log in as root. $ /opt/hpws/webmin/webmin-init start Point the browser to: http://yourserver.com:10000/ Login : admin Password : hp.com From here, you can click on the Servers tab and start managing the HP-UX Apache-based Web Server Please remember to change your password. Instructions are provided under Configuration - Changing Administrator's Password. To stop Webmin: Log in as root. $ /opt/hpws/webmin/webmin-init stop

Automatic Restart at Boot-up

If you would like to automatically restart Webmin at boot-up time, you will have to modify the specific components configuration file: /etc/rc.config.d/hpws_webminconf - Set the HPWS_WEBMIN_START variable to 1. If you do not desire this feature, set the HPWS_WEBMIN_START variable to 0. By default, it is set to 0. The line below shows how to turn it on. HPWS_WEBMIN_START=1 The startup scripts have a direct dependency on the HPWS_WEBMIN_HOME variable, and expects Webmin to be located in that directory.


Webmin has been pre-configured with the defaults listed below. If you would like to change those defaults, run /opt/hpws/webmin/setup.sh as root and specify the configuration that you want. In addition, if you want to use /opt/hpws/webmin/conf/ as the preferred configuration directory, remove /opt/hpws/webmin/conf/ and /opt/hpws/webmin/logs/ directories before running setup.sh. By default, the configuration directory is /opt/hpws/webmin/conf/, and the logs directory is /opt/hpws/webmin/logs/. If you want to use the same directories, but change the configuration, remove them first and then run /opt/hpws/webmin/setup.sh.

Default Configuration Values for Webmin

Configuration directory: /opt/hpws/webmin/conf/ Log directory: /opt/hpws/webmin/logs/ Expected location of Perl: /opt/perl/bin/perl Operating system type: HP-UX 11.x Web server port: 10000 Login / password: admin / hp.com The password is easily changed using changepass.pl. See below for details. It is highly recommended that you change your password after installation. Web server hostname: machine name returned using 'hostname' command Use SSL: Dependent on your version of Perl. Not enabled by default. This question will only be asked if your Perl has the Perl Net::SSLeay module installed. See Running Webmin under SSL Start Webmin at boot time: Available by a different method.

Changing Administrator's Password

To change the password of user "admin" to, say "foo": As root, run /opt/hpws/webmin/changepass.pl /opt/hpws/webmin/conf admin foo If you have changed the configuration directory to something other than the default, substitute it for /opt/hpws/webmin/conf.

Adding Modules to Webmin

You can find an extensive selection of modules to add to Webmin from: http://webmin.thirdpartymodules.com/ This list includes third party modules, as well as the modules that are standard, but excluded from this bundle. NOTE: Take care that as you add new modules, you do not inadvertently allow Webmin Administrators too much system access. All Webmin modules are easy to add using the Webmin Interface. 1) On the Webmin Tab, select Webmin Configuration. 2) Select Webmin Modules 3) Go to the Install Module, and select the method (local file, uploaded file, or ftp or http URL) that you want to use. 4) Specify the location in the input box. 5) Click on button "Install Module from file" 6) Upon successful installation, a message will be displayed listing the modules installed, the installation path used, and the size of the module.

HP-UX Tomcat-based Servlet Engine Module

The HP-UX Tomcat-based Servlet Engine is accessible from the HP-UX Web Server Suite page. If HP-UX Tomcat-based Servlet Engine is installed, options will be available to turn it on or off, and to access the 'Tomcat Web Application Manager' or the 'Tomcat Web Server Administration Tool'.

Running Webmin under SSL

Webmin can be configured to run using SSL if the Net::SSLeay Perl module has been built into Perl. To check that the Perl you are using has the required module, the following command should not return any output: </path/to/perl> -e 'use Net::SSLeay' To enable SSL, when Webmin is running, go to the Webmin Configuration icon on the Webmin tab (or http://yourserver.com:10000/webmin). Click on the icon for SSL Encryption. Click on the "Enable SSL support, if available" and then Save. Webmin will automatically redirect the browser so you use "https" in the URL. ** Remember to connect to Webmin using https://yourserver.com:10000/ To disable, go back to the same screen and click "Disable SSL support, even if available."

Changing the Default Look and Feel Using Themes

To change the default Webmin theme, when Webmin is running, go to the Webmin Configuration icon on the Webmin tab (or http://yourserver.com:10000/webmin). Click on the icon for Webmin Themes. In the first section, from the drop-down menu, change the "Current Theme" to the theme of your choice and click on the "Change" button. If the pages do not display correctly initially, refresh your browser. Sometimes starting a new browser window will reset cached values.

Enabling Internet site search from behind a firewall

To search Internet sites from behind a firewall using the System Documentation module (within the "Others" tab) or the Search docs feature, a HTTP Proxy server must be specified. To perform this task, go to the "Admin Settings" tab, and then the "Webmin Configuration" section. An example HTTP Proxy looks like the following: http://myproxy.yourserver.com:8088/


Identifying the Path to the Current Configuration Screen

The HP-UX Webmin-based Admin supports breadcrumb navigation trail to identify the location of the current configuration screen with respect to other screens. The term "breadcrumb" comes from the story of "Hansel and Gretel" -- breadcrumbs were left by the characters to find their way back home. Breadcrumbs let you know where you are in a web page, as well as how to retrace your steps. The breadcrumbs are located in the top left quadrant of the page, under the Start/Restart/Stop Apache buttons and represent the site hierarchy. "Home" is always displayed in the breadcrumb and refers to the initial HP-UX Apache-based Web Server configuration screen. The last item in the breadcrumb is the current page, and is not clickable. For example, when modifying the "Document Options" of the /opt/hpws/apache/htdocs directory, in the context of the main Apache server, the breadcrumbs for that screen would be displayed like this: Home > default server > Directory /opt/hpws/apache/htdocs > Document Options Thus, breadcrumbs show a path to making configuration changes and for easy navigation through HP-UX Webmin-based Admin.

Different levels of Apache configuration

Administration directives for an Apache server can be specified in multiple levels. Depending on which level one provides the configuration, the configuration is effective to that particular level. All of Apache directives have their scope of effectiveness, i.e., if a directive has been specified to be effective on a certain level, it cannot be specified on a different level. The following are the three levels of configuration for Apache. * Global Configuration If a configuration is specified at the global level, then the entire Apache server is effected. Directives such as the port number on which Apache will listen and serve requests on, is specified at this level. * Server specific Apart from global level, configuration can be specified at the server level as well. Apache has support for virtual servers, and by default it starts with a "main" server. Some of the directives are specified at the server-specific level, such a logs. * Location/Directory specific Finally, in Apache, one has the flexibility to make changes at the level of a directory as well. Thus an administrator could provide specific behavior to certain directories, such that other directories are not affected by it. This allows for fine grain administration. Webmin has support for administering in the above mentioned various levels.

Making changes to Apache configuration

In Webmin, every configuration change requires you to follow these steps in order to get a successful completion of task. * After every change made, one needs to first "Save" the changes and then "Restart Apache" with those changes, for it to become effective. * When enabling/disabling SSL for Apache, one must "Stop Apache" and then "Start Apache". Restarting is not sufficient. * If one makes change to "Settings" of Apache, one has to stop and then start Apache for these Settings to take effect.

Restart vs Stop and Start

When you enable the following modules, a simple restart of Apache will not reflect the changes. You must stop and then start Apache for the changes to be recognized. - auth_ldap - mod_jk - mod_perl - mod_php - mod_ssl

Default Directive Values

The meaning of "Default" in Apache configuration has a special meaning. A directive with a "Default" setting indicates that when the directive is not specified within the configuration file, the directive will behave as it was specified when the Apache server was built. Thus by selecting "Default" in the Apache configuration means that the directive will not be included in /opt/hpws/conf/httpd.conf. The defaults are displayed when the mouse rests over the Apache directive name.

SSL Configuration

SSL configuration for Apache is supported through HP-UX Webmin-based Admin. SSL in Apache can be enabled at any of the following levels: - For the entire server (which has the default port of 80). - For the virtual server (with a port of 443). In order to enable SSL, one has to make sure that the following directives are also configured. SSLCipherSuite SSLCertificateFile SSLCertificateKeyFile In addition, one also has to make sure the following directives are configured in "Home > Global > SSL Options" section. SSLPassPhraseDialog SSLSessionCache SSLMutex SSLRandomSeed

Certificate and Key Management

Certificates, Keys and Certificate Requests can be made using OpenSSL that is shipped with Apache. This can be accessed from the "Certificate Manager" icon on the main page. From this page, choose one of the options: - Manage an existing certificate * View Certificate, Key, or Certificate Request * Deploy a Certificate and Key pair to an existing Virtual Host * Backup a Certificate, Key or Certificate Request * Modify PEM Pass Phrase for a Key From here, add, change, or delete a PEM Pass Phrase from a Key. However, there is no way to retrieve a Pass Phrase if it is unknown. - Create a new Certificate, Key, or Certificate Request as a self-signed CA or as a server * After creating, the item can be 'Managed' using the above options. Note: Management of certificates should be done using Webmin over SSL. To enable SSL, go to Admin Settings > Webmin Configuration > SSL encryption.

Apache Configuration File Backup & Version Management

Support has been added to Back-up and Retrieve Apache configuration files from Webmin. This depends on RCS being installed. By default, Webmin looks for /usr/bin/rcs, however it is also configurable from the Apache Settings page. To access, from the main screen, click on the "Back-up Config Files" icon. Initially, you will be asked for a description. Then, the initial revision will be set. From here, a table lists all of the different versions available for this file. Labels can be added to a particular version. Files that are Included into the main Apache configuration file will be picked up as well. Different versions of the configuration file can be compared.

Mod_LDAP / Mod_Auth_LDAP Configuration

Starting with HP-UX Web Server Suite v.A., ASF provided modules, mod_ldap and mod_auth_ldap, are supported. While only partial support is currently available for configuring these new modules, complete support for auth_ldap is still available through HP-UX Webmin-based Admin. The new icon/title for mod_auth_ldap module:
LDAP Authentication The icon/title for auth_ldap module:

Edit Defined Parameters

- Webmin only knows about the parameters entered in the textfield or currently in /opt/hpws/apache/conf/httpd.conf. It does not know about any parameters you may have started Apache with already. - You must Save the changes to the parameters, and then Stop and Start the Apache Web Server for changes to take effect. Simply Restarting the Apache Web Server (clicking on "Apply Changes") only re-reads httpd.conf, but does not take any parameter changes into account. This is the same way that the apachectl script works. - Format for the Paramaters should be as follows: Parameter1 Parameter2 Parameter3 There should be whitespaces between the Parameters. Note that the defined parameters don't need to begin with "-D"



- HP-UX Webmin-based Admin has been customized to recognize HP-UX Internet Express components. A section titled "HP-UX Internet Express", visible from Webmin, groups all installed components. - At installation time of HP-UX Webmin-based Admin, the installed HP-UX Internet Express components will be discovered automatically and Webmin will be configured to support administration of those components. - During the installation time of an HP-UX Internet Express component, if HP-UX Webmin-based Admin is already installed, then the component will configure Webmin to recognize and support itself.


- Administrative changes made to an HP-UX Internet Express component will result in real-time modifications to its configuration file(s). - Specific instructions for administration of a module may be found in the documentation provided by the HP-UX Internet Express component. ***************************************************************************