VPN virtual privet Network !
What is the VPN ?
Basically VPN is connecting remote locations two or more each other thru internet or ISDN or dialup
Which is we can’t connect in local area. now days most of VPN s using over internet why ? it’s cheaper and easy to subscribes such like Broad Band and ADSL and good speed
So let’s see how we can configure VPN thru the ADSL or broad band
First of all we need to isolate to ends to connect each other .
Using Dynamic connections
Most of internet DSL or Broad Band connection are Dynamic (temper IP) ones you restart your router ip address will be change for this reason we need use DNS (Domain Named System)
DNS
Domain Named Systems
How DNS use for our VPN connection? When we considering for non changing hop in DSL or Broad Band connection we can use this DNS
How it works?
Easy you have to go to http://www.dydns.org/ and make a logging
Note. Especially if you have ADSL connection you can use same username and password provided by ISP
From that you can verify your conformation witch they will send to your mail box
Then go to your account and add domain Name for your location
1 add DNS and type name you like
2 choose domain from the list there is lots of domain you can choose
Ex. your name .dydnds.org/yourname.dynds.info
3. after create dyndns click your domain name appear in top of the window then you can see there is one tick to select AUTO PICK IP select and exit
Now you have domain isolate for internet where ever you ping to your DNS you can see your IP Address available
Next step how to configure Cisco Linksys VPN firewalls
Friday, January 16, 2009
Wednesday, January 14, 2009
Friday, January 9, 2009
wireless networking
wireless network 
wireless network same concept of LAN difference is we won’t use cable to attach each other, its using radio signals for media –we need to have wireless access point or hub or router to setup networks and computers must be install wireless network card or adapters Let’s see how it works First we need to setup wireless access point Step 1 Make a network name –name for identify particular networks to be connected ex. most of wireless devices its shows with their brand name or “default” so u need to change it to your own name why? If you using it in rush area (many networks like a shopping mall or streets) u should change it stop to conflict with others networks Wireless network security This is most important thing in wireless network setup you need to consider why? Unlike a hard Networks out side’s can easily come to your network we have to use better security method encrypt your network. How to make my network encrypt? Easy most of wifi access point has wireless security option you need to configure it As ex : I will show you how to configure Linksys WAP4400n access point
WAP4400n
wireless networks
wireless network same concept of LAN difference is we won’t use cable to attach each other, its using radio signals for media –we need to have wireless access point or hub or router to setup networks and computers must be install wireless network card or adapters Let’s see how it works First we need to setup wireless access point Step 1 Make a network name –name for identify particular networks to be connected ex. most of wireless devices its shows with their brand name or “default” so u need to change it to your own name why? If you using it in rush area (many networks like a shopping mall or streets) u should change it stop to conflict with others networks Wireless network security This is most important thing in wireless network setup you need to consider why? Unlike a hard Networks out side’s can easily come to your network we have to use better security method encrypt your network. How to make my network encrypt? Easy most of wifi access point has wireless security option you need to configure it As ex : I will show you how to configure Linksys WAP4400n access point
WAP4400nbasic networks
Type of networks
Local area network - LAN
Wide area Network –WAN
Local area connection
LAN these networks designed for small geographical areas
such like office and home, internet cafe’s, etc
Wide area Networks
WAN these networks using for larger geographical area communicate
Such like internet (DSL), dial up, ISDN
Lets learn about how to setup
Step 1
We need have two or more computers with network card
Before you go to next step we need to know about cabling...
For network we are use many kind of cables
Copper, fiber, coaxial, power cables (main power)
Copper cables better for local area network when you consider speed and cost of the network so we better use copper cables other all will discuss later
Ex: copper cables its call CAT5, CAT6,
CAT5 cables has eight pairs you can see picture bellow
Connectors for CAT5
We need to use connectors to terminate both end of the cable
That connectors is call RJ 45 connectors
We need to crimp cable in order to RJ45 connector (see below)
After crimp it properly you can check your cable using cable tester
See ‘cable tester image’
At least you need to make two cables like this we call it straight cable (see cable concept picture)
Then you need to net work switch or hub to connect two each other
Network hub –network hub how its works
Basic hub are just a device with number of network ports 4prts,8 ports,16ports,it communicates each other ports see “network HUB picture”
You can connect 2 ends of PCs(in network port)and other end to network hub
Go to control panel network (in vista network sharing center) double click and find manage network connections in left side pane
And go to local area connection right click and chose properties in that property you can see TCP/IP protocol in default you can see its autos that you need change to manually assign
(See picture network) then we need to assign IP address (about IP address see ip address tab)
Now we will enter this TCP/IP number -192.168.1.1
Subnet mask-255.255.255.0
Do change same second computer and change it to this TCP/IP -192.168.1.2
Subnet mask-255.255.255.0
network cable concept straght and cross>
Local area network - LAN
Wide area Network –WAN
Local area connection
LAN these networks designed for small geographical areas
such like office and home, internet cafe’s, etc
Wide area Networks
WAN these networks using for larger geographical area communicate
Such like internet (DSL), dial up, ISDN
Lets learn about how to setup
Step 1
We need have two or more computers with network card
Before you go to next step we need to know about cabling...
For network we are use many kind of cables
Copper, fiber, coaxial, power cables (main power)
Copper cables better for local area network when you consider speed and cost of the network so we better use copper cables other all will discuss later
Ex: copper cables its call CAT5, CAT6,
CAT5 cables has eight pairs you can see picture bellow
Connectors for CAT5
We need to use connectors to terminate both end of the cable
That connectors is call RJ 45 connectors
We need to crimp cable in order to RJ45 connector (see below)
After crimp it properly you can check your cable using cable tester
See ‘cable tester image’
At least you need to make two cables like this we call it straight cable (see cable concept picture)
Then you need to net work switch or hub to connect two each other
Network hub –network hub how its works
Basic hub are just a device with number of network ports 4prts,8 ports,16ports,it communicates each other ports see “network HUB picture”
You can connect 2 ends of PCs(in network port)and other end to network hub
Go to control panel network (in vista network sharing center) double click and find manage network connections in left side pane
And go to local area connection right click and chose properties in that property you can see TCP/IP protocol in default you can see its autos that you need change to manually assign
(See picture network) then we need to assign IP address (about IP address see ip address tab)
Now we will enter this TCP/IP number -192.168.1.1
Subnet mask-255.255.255.0
Do change same second computer and change it to this TCP/IP -192.168.1.2
Subnet mask-255.255.255.0
network cable concept straght and cross>
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