Author Archives: pingd

CentOS 6 Yum-Cron Automatic Updates

Some of us prefer the yum-cron method of automatic updates. CentOS 6 shipped out with a daemonized updater that may not suit your particular needs. Here is the proper procedure for switching over to yum-cron: You should then run a … Continue reading

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VLC 2.0.1 Vulnerability

There is a new vulnerability in VLC as of 04/19/2012. It’s a denial of service division by zero exploit. The affected versions of software are VLC 2.0.1. The division by zero vulnerability is experienced when handling MP4 files. The following … Continue reading

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WHM Not Showing Disk Usage Under List Accounts

Did you login as root to your WHM and see that the List Accounts page does not show you your user’s disk usage. It may show the usage is 0 or unlimited. You need to initialize quotas! First you need … Continue reading

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Remote Processor Buffer Overflow: Snort 2.6.1, 2.7 Beta 1, SourceFire IDS 4.1, 4.5 and 4.6.

As of 04/09/2012 there is a remote processor buffer overflow alert/concept for the following software: Snort: 2.6.1, 2.7 Beta 1 SourceFire IDS: 4.1, 4.5 and 4.6

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Dump MySQL Database Schema

You may need to make a development or blank copy of a database driven project for your programmer. Maybe the data is very large and making a full copy would take too long. Maybe you don’t trust your coder with … Continue reading

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Enable PPP for OpenVZ Container

Some of your OpenVZ customers may request access to PPP. If you allow VPN and other forms of tunneling you may want to give them access to PPP. First you must make sure you have PPP support on the node. … Continue reading

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Set Switch Port VLAN on CISCO IOS

So you have created a vlan on your CISCO switch and now you want to use it with one of the switch ports. In this example we’re going to use a CISCO 2950 series switch. First you will need to … Continue reading

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View, Delete and Create VLAN on CISCO IOS Switches

For our purposes we will be using a CISCO 2950 switch to view our current vlans, delete an old vlan and create a new vlan. You will need to have your router configured for the vlan in question and it … Continue reading

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SSH Brute Force Protection (iptables)

For our first tutorial on SSH brute force protection we will utilize the iptables method. This is a very easy via the following iptables commands: You will of course need to replace ‘–dport 22′ with your SSHd port if it’s … Continue reading

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Installing Pure-FTPd on CentOS from source code.

We will be installing Pure-FTPd 1.0.32 on CentOS 5.6 in this tutorial. These are the latest versions at the time of writing this tutorial. Pure-FTPd offers a comprehensive FTP server solution that is easy to implement on CentOS. Let’s start: … Continue reading

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