Howtos / Articles

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 http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-7.noarch.rpm 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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Installing lspci on CentOS

The lspci command, which can be found in the pciutils package, is a great tool for finding information on the devices in your PC. the lspci command will allow you to get the model number/chip details for devices such as network interface cards, sound cards, raid cards, etc. To install pciutils on CentOS/RHEL using yum: (make sure you are logged in with root privileges) # yum install pciutils Example installation output: # yum install pciutils Loaded plugins: fastestmirror, presto Loading…

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