My Journey | My Journal

I already heard about OpenDNS a while ago but for some reason never looked much into it. Until I got request to setting up the server for a community which has policy to block adult sites, phishing sites and individual sites. This request reminded me about OpenDNS so I thought I need take a look. One advantage from openDNS is the configuration can change from their website, Just create user on openDNS website and tick the website category which needed to block.

So, what is OpenDNS?

OpenDNS protects millions of people a day across hundreds of thousands of schools, businesses and homes. We block phishing sites, give you the power to filter out adult sites and proxies among more than 50 categories, and provide the precision to block individual domains.

The network setting will using squid proxy server to handle all http request from the client. The squid proxy server will use openDNS as default DNS for the network. We just stop using ISPs DNS, which can often be slower or unreliable, and use this instead. Here is how to set it up on an Ubuntu machine. You can see the Ubuntu setup instructions on the OpenDNS site if you’d like more information.

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Sometimes some people forget their root password on their Linux machine. And not recommended to install back the Linux since so many configuration have done during that period time. Now, we can retrieve the password as long as we have physical access to the Linux machine. There are 2 ways to solve this problem.

1st way
Reboot your Linux machine
Get into “grub” menu then press “e”
Go to your default kernel then press “e” again
Then go to grub prompt grub> default_kernel single <– type “single” at the end of your kernel. We are entering single mode.
Then it will appear as sh-3.00#
Then type “passwd” or edit /etc/passwd

2nd way
Reboot your Linux machine
Boot from 1st CD of your distro
Get into the “Rescue Mode”
Follow the instruction
We get into prompt again sh-3.00#
Type “sh-3.00# chroot /mnt/sysimage”
Then type passwd or anything you want

Congratulations you have your root password back. Don’t forget about your root password again in the future

Do you know cisco router?, expensive isn’t it?. But you need cisco performance with cheaper price?. Vyatta is an answer. Vyatta is Linux cutomized based on Debian Linux. Vyatta is open source networking distro which combine the features, performance, and reliability of an enterprise router and firewall with the cost savings, flexibility, and security of open source to introduce new levels of economics, choice, and control into the network

The Vyatta open source routing platform is built upon XORP, the eXtensible Open Router Platform, and uses templates to execute commands that are entered into the xorpsh, also know as the Vyatta CLI, much like other routing platforms.
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Kali ini saya akan memberikan sedikit tips untuk menggunakan proxy server terpisah dari mikrotik. Walaupun kita tahu di mikrotik sendiri disediakan proxy server, tetapi untuk menangani klien berjumlah banyak dan agresif dalam pemakaian internetnya perlu disediakan tersendiri proxy server.
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Remember OLPC project?, project has a new version of The One Laptop Per Child Project’s (OLPC’s) XO laptop will run both Linux and Windows. Microsoft Operating System that run on OLPC is low cost student version of windows XP. Then for Linux will using the traditional Linux-based Sugar operating system.

OLPC Chairman Nicholas Negroponte has referred in the past to a dual-boot XO model, but this is the first official announcement of such a system. The XO was developed by OLPC for children in developing countries, and Negroponte hopes to eventually make it available for $100. The availability of Windows on the system will give customers more choice in operating systems and let them use Windows-based educational software and tools, the parties said. Customers and partners worldwide have asked for Windows on the XO, they said.
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