MakanKor.net » IT

Speed Fastnet

mekanzoo — Mon, 22 Oct 2007 23:15:51 +0000

Web Crawler

mekanzoo — Sun, 09 Sep 2007 02:52:24 +0000

Ingin memiliki web crawler sendiri?

“Heritrix is the Internet Archive’s open-source, extensible, web-scale, archival-quality web crawler project.

Heritrix (sometimes spelled heretrix, or misspelled or missaid as heratrix/heritix/ heretix/heratix) is an archaic word for heiress (woman who inherits). Since our crawler seeks to collect and preserve the digital artifacts of our culture for the benefit of future researchers and generations, this name seemed apt.”

http://crawler.archive.org/

GSM, CDMA

mekanzoo — Thu, 06 Sep 2007 15:11:15 +0000

Pernah penasaran bagaimana GSM dan CDMA bekerja?

Simaklah artikel berikut..

“(On Screen): As I think many of my readers know, I used to work for Qualcomm designing cell phones. Qualcomm is the company which invented CDMA, and made it practical, and made it into a market success, and it now dominates the American market, where Verizon and Sprint both use it. There are two other nationwide cellular systems: AT&T currently uses IS-136 TDMA, which is obsolete and has no upgrade path. Cingular uses GSM, a more sophisticated form of TDMA from Europe.”

http://denbeste.nu/cd_log_entries/2002/10/GSM3G.shtml

Teknik frequency sharing CDMA dengan gambaran yg lebih sederhana

http://denbeste.nu/special/cdma_spreading.html

Writing a bittorent enabled java application

mekanzoo — Sun, 26 Aug 2007 10:39:48 +0000

The type of traffic distribution on the Internet today is quite different from the type you might have encountered only a few years ago. In the past, the vast majority of internet bandwidth was used to transfer character streams (in most cases HTML) over either HTTP or HTTPS. This trend has changed over the past few years, with a great deal of bandwidth (33 to 50 percent by some estimates) now being used to distribute large files over peer-to-peer connections. BitTorrent is one of the more popular protocols being used for peer-to-peer file transfers, and enabling your Java applications to use this protocol has never been easier.

Internet dan privacy identitas

mekanzoo — Sat, 25 Aug 2007 12:18:05 +0000

Internet kini bukanlah hal yang baru di Indonesia, jumlah warung yang menyediakan jasa internet (warnet) pun jumlahnya sudah bejibun. Semakin banyak pula orang menggunakan internet untuk melakukan aktifitas sehari-harinya seperti mengirim surat (email), membaca berita, membayar tagihan, berkomunikasi dan lainnya.

Banyak kita menggunakan layanan online seperti gmail.com (untuk mail), google.com (untuk search) dan messenger.yahoo.com (untuk layanan instant messaging). Dengan sadar atau tidak, dengan menggunakan fasilitas-fasilitas online tersebut kita telah menukarkannya dengan identitas pribadi kita.

Mari kita ambil Instant Messenger (IM) sebagai contoh.

Penggunaan IM kian hari kian popular. Mulai dari warung-warung internet sampai perkantoran, netters menggunakan IM untuk berkomunikasi ke kerabat, keluarga ataupun rekan kerja. IM juga menjadi alat yang sangat cocok digunakan untuk berkenalan, sekedar ngobrol atau “keep in touch”.

Setiap kata yang kita tulis melalui IM (pada umumnya) dikirim melalu sebuah server. Bukan tidak mungkin setiap kata-kata tersebut di log (rekam) untuk mengetahui statistik pengguna. Lambat laun log-log tersebut akan menjadi data lengkap pribadi penggunanya.

Info tersebut diatas baru dari IM. Dengan layanan internet lainnya seperti e-mail, friendster, website, dll tentunya informasi yang dimiliki oleh “layanan asing” ini di dapat sangat lengkap, tentunya lebih lengkap dari yang dimiliki pemerintah kita.

Informasi seperti nama, pekerjaan, anggota keluarga, makanan favorit, kebiasaan sehari-hari, transaksi bisnis, adalah beberapa contoh yang mungkin dapat disimpulkan dari log-log yang ditampung layanan online.

Informasi data-data pribadi jutaan orang….. sangat mahal harganya… dan banyak yang mau membeli.

Beberapa tips untuk menjaga privacy di internet:

1. Gunakan IM client yang mendukung encryption.

Skype (http://www.skype.com/security/security/);

GAIM dengan OTR plugin (http://www.cypherpunks.ca/otr/)

2. Sebisa mungkin, hindari pengisian identitas (asli) pada layanan online, terutama yang gratisan. Hanya gunakan layanan online yang anda benar2 percaya.

3. Bila melakukan transaksi online, gunakan ssl (https)

4. Gunakan encryption pada e-mail

Thawte e-mail certificate
5. Gunakan layanan lokal. (mudah-mudahan mata-matanya lebih dikit).

Sekian dari saya, harap ada tips-tips tambahan…

Referensi:

Screen: Tips & Tricks

mekanzoo — Thu, 02 Aug 2007 05:58:29 +0000

In this article I will describe a very useful program: GNU Screen. Usually this program is used by people who have a shell account on a Unix server. But it can be also helpful to people who haven’t yet started to use a terminal or even Linux/Unix at all. Screen — simply — is a program which enables users to create more system shells without the need of logging in multiple times. Moreover it allows to leave programs running after you’ve logged out. What can it be useful for? For example to continue compiling or downloading something when someone wants to use the computer, or to run more than one terminal for one ssh connection. There are many more possible ways of using it…

http://polishlinux.org/howtos/screen-tips-tricks/

Run torrent on linux console

mekanzoo — Thu, 02 Aug 2007 05:57:22 +0000

“In this article I’d like to describe a text-mode Bittorrent client - rTorrent. It will be helpful to people that share a computer with other household members because it allows them to download files regardless of the logged in user. What’s more, because it is a text-mode client (runs under ncurses) you can watch how it works through any ssh client, web browser (ajaxterm) or even cell phone (MidpSSH). Wikipedia and the official website says that the very optimized code makes rTorrent much faster than the official client. So, do you want more? Bring it on!”

http://polishlinux.org/apps/p2p/rtorrent-console-p2p