Red Hat Cluster Suite, Manual

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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
You can also allow specific hosts or subnets as seen in this example: