How to Drop or Block Incoming Access From Specific IP Address Using Iptables

In this post, i will show you the simple way to block incoming ip address using iptables firewall on CentOS 5.5. This setting will be removed once you restarted the iptables or rebooted the server. OPTIONS = long or short options are allowed. –append -A Append to chain –delete -D Delete matching rule from chain […]

How to Fix “Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)”

Problem : Unable to read CDs or DVDs and DVD/CD-ROM drive also did not show up on My Computer. Troubleshooting: -Right Click on Device Manager -Select DVD/CD-ROM drives -Select the missing DVD/CD-ROM and should has a yellow exclamation mark -Return device status with below error: “Windows cannot load the device driver for this hardware. The […]

How to Backup Registry in Windows

Modifying the windows registry manually is a task are best handled by end users that are really knowledgeable in computers area. But before do any manual changes to Windows registry, it is advisable to take a back up. It is always a good practice for us to backup before perform manual changes on registry. Although […]

How to Submit Website or Blog to Yahoo Site Explorer

In this post, i will share with you how to submit your website or blog to yahoo site explorer. This is to ensure that your website indexed in yahoo search engine. Hence it will increase your traffic or visitors.  The only things that you need is yahoo mail account. Just follow below steps : 1. […]

How to Use chmod Command to Change Linux File Permissions

In this post, i will share with you the basic chmod command usage to change linux file permission. This was tested on CentOS 5.5. Who – ugoa controls : u = Owner g = Users in the Group o = Other users not in the group a = All users/Everyone Permission : r = Read […]

How to Add Persistent Static Routes in CentOS 5.6

This example will show you on how to configure the persistent static route in CentOS 5.6 server. This configuration may different with other version of CentOS but the basic is almost the same. Persistent static route will permanently stored the setting and will not be deleted after rebooted. 1. Go to /etc/sysconfig/network-scripts/ [root@server ~]# cd […]

How to Add Static Routes in CentOS 5.6

This tutorial was performed at my VPS server, therefore the NIC interface is using venet0 instead of eth0. This may different with your environment but all the steps should be same. For your information, this configuration will be erase once you rebooted the server. You should use persistent static route if you want to permanently […]

How to Install and Configure Linux Iptables Firewall in CentOS 5

Iptables is the most popular packet filtering firewall package in linux. It can be used to set up, maintain, and inspect the tables of IP packet filter rules in the Linux kernel. Iptables interfaces to the Linux netfilter module to perform filtering of network packets. Steps: Install the iptables wihthout gui. [root@server ~]# yum install […]

How to Install and Configure Monit on Linux Server for Process Monitoring

Monit is a open source utility for managing and monitoring, processes, files, directories and devices on a Unix system. Monit can perform automatic maintenance and repair and can execute useful actions in error situations. E.g. monit can start a process if it does not run, monit can restart a process if it does not respond, […]

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