Howtos / Articles

Default config unlock password on a Cisco 7940 / 7960 series handset

To change any configuration options on a Cisco 7940 or 7960 series voip handset itself (not over tftp), you need to enter in a unlock config password. This may be needed if you want to set up the handset with a static IP address. To get to the unlock config screen, press the “Settings” button, scroll down to “Unlock Config”, and press the “Select” softkey. You will now be asked to enter the password. The default password is “cisco”. As…

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Remove nginx version from HTTP response headers

Its usually a good idea to prevent users from being able to determine the version number of the web server software you are using. This helps prevent people from then going and looking for known vulnerabilities in that specific version, and attacking your site. When a HTTP response comes back to the web browser, it also includes a number of headers. One of these headers is the “Server” header. This is used to identify the web server software being used.…

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Logo URL for Cisco 7940/7960 on Trixbox

The Cisco 7940 and 7960 VOIP phones (possibly other models too) allow you to send a image file to the phone for it to display as the main logo while the phone is idle. Trixbox comes with a image file you can use by default, however it doesn’t automatically set up Cisco phones to use it. The url you need to use for the Logo URL is as follows: http://<ip of trixbox server>/cisco/bmp/asterisk-tux.bmp Note: Replace “<ip of trixbox server>” with…

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Installing HAProxy on CentOS 6

This guide will step you through the process of installing HAProxy on CentOS 6. To install HAProxy on CentOS 6 you first need to set up your installation to use the epel software repository. HAProxy is not available in the default CentOS repositories. (Note: All commands below require root privileges.) rpm -Uvh You can now install haproxy. yum -y install haproxy Now that HAProxy is installed, you can configure the haproxy.cfg file. vi /etc/haproxy/haproxy.cfg Once you have configured HAProxy,…

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Monitoring Compaq or HP Smart Array RAID status on CentOS

This howto will step you through the process of setting up the required software to be able to check the status of a Compaq or HP Smart Array and the attached physical and logical drives on CentOS 6 or RHEL. The required program to be able to talk to the Smart Array is called ‘hpacucli’, which can be found in the ‘HP Service Pack for ProLiant’ package. (Note: Some of the commands below require root privileges.) Obtaining and Installing the…

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