Installation guide

100 Chapter 8. Initial LVS Conﬁguration

8.3.1. Conﬁguring the Piranha Conﬁguration Tool Web Server

Port

The Piranha Conﬁguration Tool runs on port 3636 by default. To change this port num-

ber, change the line Listen 3636 in Section 2 of the piranha-gui Web server conﬁg-

uration ﬁle /etc/sysconfig/ha/conf/httpd.conf.

To use the Piranha Conﬁguration Tool you need at minimum a text-only Web

browser. If you start a Web browser on the primary LVS router, open the location

http://localhost:3636. You can reach the Piranha Conﬁguration Tool from

anywhere via Web browser by replacing localhost with the hostname or IP address of

the primary LVS router.

When your browser connects to the Piranha Conﬁguration Tool, you must login to access

the cluster conﬁguration services. Enter piranha in the Username ﬁeld and the password

set with piranha-passwd in the Password ﬁeld.

Now that the Piranha Conﬁguration Tool is running, you may wish to consider limiting

who has access to the tool over the network. The next section reviews ways to accomplish

this task.

8.4. Limiting Access To the Piranha Conﬁguration Tool

The Piranha Conﬁguration Tool prompts for a valid username and password combina-

tion. However, because all of the data passed to the Piranha Conﬁguration Tool is in

plain text, it is recommended that you restrict access only to trusted networks or to the

local machine.

The easiest way to restrict access is to use the Apache HTTP Server’s built in access control

mechanisms by editing /etc/sysconfig/ha/web/secure/.htaccess. After altering

the ﬁle you do not have to restart the piranha-gui service because the server checks the

.htaccess ﬁle each time it accesses the directory.

By default, the access controls for this directory allow anyone to view the contents of the

directory. Here is what the default access looks like:

Order deny,allow

Allow from all

To limit access of the Piranha Conﬁguration Tool to only the localhost change the

.htaccess ﬁle to allow access from only the loopback device (127.0.0.1). For more

information on the loopback device, see the chapter titled Network Scripts in the Red Hat

Enterprise Linux Reference Guide.

Order deny,allow

Deny from all

Allow from 127.0.0.1