Before you buy high page rank domain you should consider these items. I hope that you don’t buy wrong domain. OK, let’s see what should be concern before we buy one or several domain.

1. Check the page rank was valid or not. To check the domain valid or not, you can use some tools. I use http://www.digpagerank.com, http://www.diagnosticweb.com, or http://www.checkpagerank.net to check page rank validity, or you can use another tools.
2. Check the back link of that site. You can use http://www.backlinkwatch.com to check how many sites that domain has.
3. Check if that domain is indexed in google or not. You can follow these ways :

• Go to http://google.com
• Type : info:domainname.com to check domain’s validity and google related information
• Type : site:domainname.com to check if domain was indexed in google or not.
• Type : cache:domainname.com to check if domain was cached in google or not.

Well, I hope we can choose a right domain to buy and we can share information about this topic.

Di tengah perkembangan teknologi jaringan korporat yang makin pesat. VLAN cisco masih sangat popular di mata para network administrator. Bahkan, teknologi WAN yang notabennya identik dengan OSI Layer 3, sekarang kembali memakai OSI Layer 2, seperti kita lihat pada teknologi Metro Ethernet yang menghemat perangkat. Tidak perlu menggunakan router yang harganya mahal dan hanya menggunakan Switch sekelas Cisco 2900 series atau switch Layer 2 lainnya.Untuk masalah routing terserah kita apakah menggunakan dynamic route seperti EIGRP, BGP, OSPFatau menggunakan static route.

Sebenarnya, apa sih keuntungan menggunakan VLAN ?

1. Network administrator lebih mudah mengelola jaringan di suatu tempat baik secara fisik maupun secara logic.
2. Mengurangi broadcast domain
3. Memudahkan mengontrol trafik jaringan
4. Memberikan sistem keamanan jaringan yang lebih baik.

VLAN menguntungkan baik di sisi network administrator maupun penggunanya. Untuk Metro Ethernet, kita bisa membagi cabang dengan VLAN yang berbeda.Misal, cabang Jakarta menggunakan VLAN 1, cabang Bandung menggunakan VLAN 2, cabang Makasar menggunakan VLAN 3 dan seterusnya.

Untuk lingkungan kantor, network administrator bisa membagi VLAN berdasarkan departemen yang ada di perusahaan tersebut. Misalkan departemen HRD menjadi VLAN 1, departemen accounting menjadi VLAN 2 dan seterusnya.

VLAN terbagi menjadi port based, mac address based, maupun protocol based. Yang sering digunakan adalah VLAN port based karena jenis VLAN ini mudah dikonfigurasi dan mudah untuk diimplementasikan.

Jadi, ada yang mau berdiskusi tentang VLAN? Mari kita berbagi.

Baca juga :

• Mengenal Tipe-Tipe Kabel Fiber Optic
• Perangkat Keamanan Jaringan yang Wajib Anda Ketahui
• 10 Kecerobohan fatal network Administrator
• Monitoring Router dengan Netflow Analyzer

For several last year, Linux has developed many tools to make it like Windows. In the list below, I give you 15 free Linux Tools  so that your Linux can be similar with Windows

Graphics :

• The Gimp

  This Linux tool substitute Adobe Photoshop .Free Picture Editor.

• F – Spot

  Photo management tools.This tool in Linux can substitute ACDSee

• Inkscape

  Corel substitute tools.

• Google Picasa

  Editor and organize digital photo management software.

Office :

• OpenOffice Writer

  MS Word substitute tools

• OpenOffice Calc

  MS Excel substitute tools

• OPenOffice Impress

  MS Powerpoint substitute tools

• Adobe Reader for Linux
• GnuCash

  Double-entry book keeping personal finance system, same with Quicken

• Scribus

  Open source desktop publishing (DTP) application

• Kivio

  Substitute software for Microsoft Visio

Programming :

• KompoZer

  WYSIWYG HTML similar with macromedia Dreamweaver even the feature not many as Dreamweaver yet

• Gambas

  Substitute software for Visual Basic

• Bluefish

  Text editor, can be used for any programming language

• Quanta Plus

  Web development area, including editor WYSIWYG

See Also :

• Jebol (Hack) Password di Linux Redhat 9

• 6 Steps How to Configure MRTG
• Linux Tools download

Before starting this tutorial, you should check IOS first. Your IOS device must support archive and Kron command.

First Step

Of course you need to create FTP server first. I suggest you use filezilla. In addition to free, this tool is very easy to manage. you can download filezilla server here.

Second Step

I think all of you familiar create ftp server. Next step you should create your own username and password in filezilla server, and specify the folder where to be shared.

Suppose username is erik and password is erik also. And d: \ backup_cisco will be shared.Your IP addres is 192.168.10.104. Do not forget to give write authority on the username that you have created.

Picture 1. How to configure shared folders

Third Step

We go to the cisco router. I use the C1841 as an example. Let’s start.

Create archive

Router # conf t

Router (config) # ip ftp username erik

Router (config) # ip ftp password erik

Defines the username and password to log in to your FTP server.

Router (config) # archive

Log in to archive mode

Router (config-archive) # path ftp://192.168.10.104/

Go to the FTP directory

Router (config-archive) # write-memory

Configuration file was save to FTP Server

After the last line in the command executed, the file will be automatically saved when we execute t write-memory command or copy run start command.
Make a backup schedule

Schedule the backup configuration can be set, if every week or every month. That’s up to you all.

Next you create Kronor in cisco, working as cronjob in Linux

Router # conf t

Entering Global Configuration Mode

Router (config) # backup occurance Kroner at 11:30 Mon recurring

Backup policy to do every day 11:30 hours Wednesday.
Router (config-Kroner-occurance) # policy-list backup

Insert the backup policy to list in Kron.

The contents of the backup policy is:

Router (config) # policy-list Kroner backup

I make cronjob with the name of the backup policy

Router (config-Kroner-policy) # cli ip ftp username erik

Authentication FTP server username

Router (config-Kroner-policy) # cli ip ftp password erik

Authentication FTP server password

Router (config-Kroner-policy) # cli path ftp://192.168.10.104/

Navigate to the FTP destination directory

Router (config-Kroner-policy) # cli wr

Save the configuration file on the router

Router (config-Kroner-policy) # cli end

Back to Previledge Mode

Router (config-Kroner-policy) # wr

Saving to FTP server

If number -1 appear on your folder, means that the backup process works

Picture 2. Succes Backup

High Price of Cisco Network Equipment sometimes make us lazy to learn network. But since some products give us router simulator software that can make us easy learn network. I’ve tried two kind of router simulator, Packet Tracer and GNS3.

Packet Tracer

Packet tracer is good for CCNA router simulator. With that software, instructor and students can easily communicate in learning process. Students can create network topology, configure device, injects packet without without real device existence. But don’t worry, the physical view is good enough. It provides routers (C1800, C2600, C2800), switches, and host with representations of expansion interface and identifies the capabilities of each interface including cities, buildings, and multiple wiring technologies.

The Key Feature of this cisco router simulator is Simulation and Visualization mode so the students can control time interval, inner working data of transfer and Propagation of Data across network. The Activity Wizard also help users to set up scenario using text, a basic network topology and predefined packet. With Real Time Mode provides good alternatives way learning network before they facing real network equipment. In My opinion, this is good CCNA router simulator.

And for CCNP router simulator I prefer using GNS3 that gives more complete network studies. Let’s discuss

See Also :

• Packet Tracer Download

• Overview Switch Layer (Ideal LAN Topology),

• Automatic Cisco Configuration Backup Through FTP