Virtual Private Networks (VPN) allow users working at home, on the road or at a branch office to connect in a secure manner to a remote corporate server using the public Internet. VPN server or host is a computer that accepts VPN connections from VPN clients. A VPN server or host can be a NT/W2K server or W2K/XP Pro. VPN client is a computer that initiates a VPN connection to a VPN server or host. A VPN client can be an individual computer running MS Windows NT version 4.0, Windows 2000, 9x. VPN clients can also be any non-Microsoft Point-to-Point Tunneling Protocol (PPTP) client or Layer Two Tunneling Protocol (L2TP) client using IPSec.
Steps
(1).Basic VPN Requirement
* User Permission. Enable a user to access the VPN. To do this, go to AD Users and Computers, select the user who need to access the VPN, click Dial-in. Check Allow access on the Remote Access Permission (Dial-in or VPN).
* IP Configuration. The VPN server should have a static IP address and assign the arrange IP addresses to VPN clients. The VPN server must also be configured with DNS and WINS server addresses to assign to the VPN client during the connection.
* Data Encryption. Data carried on the public network should be rendered unreadable to unauthorized clients on the network.
* Protocol Support. The TCP/IP is common protocols used in the public network. The VPN also include IP, Internetwork Packet Exchange (IPX), NetBEUI and so on.
* Firewall Ports. When you place a VPN server behind your firewall, be sure to enable IP protocol 47 (GRE) and TCP port 1723.
* Interface(s) for VPN server. If your network doesn't have a router or the VPN is also a gateway, your computer must have at least two interfaces, one connecting to the Internet and another connecting to the LAN. If it is behind a router, you just need one NIC.
* One interface for VPN client. The interface can be a dial-in modem, or a dedicated connection to the Internet.
(2).Configuring VPN in Windows XP Professional
* For configuring the VPN connection, you need to have a static IP address of the remote computer of your company and the host name. You can configure the VPN connection in Windows XP Professional by the following method.
* Click Start > Control Panel > Click Network and Internet connection > Click Network Connections.
* Here you need to create new connection and click next.
* Here click “Connect to network at my work place” click next.
* Click “Virtual Private Network” and click next.
* Here type the meaningful name for your company or any other network connection and click next.
* Here click “Do not dial the initial connection and click next.
* Here type the hostname and the IP address of the computer to which you want to connect.
* Press next and then press finish.
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(3).Installing VPN in Windows 2000 Professional
* Make sure that you are connected to the internet and you are also connected to the LAN.
* Start > Administrative Tools > Routing and Remote Access.
* Click the server name in the tree and on the action menu click Configure and Enable Routing and Remote Access and click next.
* Click Virtual Private Network (VPN Server) in the common configurations and click next.
* In the remote client protocols, make sure that the TCP/IP is included in the list. Click yes to all available protocols and click next.
* Select the Internet connection that will connect to the internet in the internet connection box and click next.
* Select the Internet connection that will connect to the internet in the internet connection box and click next.
* In the “Managing Multiple Remote Access Server select this option “No, I don’t want to setup this server to use Radius Server Now. Click Next > Click Finish.
* Now right click on the Ports node and click properties now click WAN mini port (PPTP) and then click configure.
* Type the maximum number of the allowed simultaneous PPTP VPN connections to this server.
(4).Configuring VPN Connection in the Client Computer
* Start > Settings > Network and dialup connection.
* Make new connection.
* Click next and then click connect to a private network through Internet.
* Click Automatically Dial this initial connection and select your dial up internet connection from the list.
* If you use cable modem then select “Do not dial this initial connection”.
* Click next.
* Here type the host name and the IP address of the remote computer to which you want to connect.
* Type the descriptive name of the connection and click next.
Tips
* If your VPN client cannot find servers or cannot ping computernmae, you may need to add DNS and WINS into your VPN server. For example, to add DNS and WINS on a Cisco Firewall PIX, add vpdn group 1 client configuation dns dnsservername and vpdn group 1 client configuration wins winsservername.
* If you have Windows 2003 server as VPN server, you can assign a static IP under user's properties. If you use other Windows OS as VPN server, you may want to create a DHCP reservation.
* If you are running w2k/xp pro setup for a domain controller, you will have a option to "log on using dial-up connection" on logon screen after creating a VPN/dial-up connection. In the Log On to Windows dialog box, the user can select the Log on using dial-up connection check box. After clicking OK, the user is prompted to choose a network connection.
Tuesday, February 17, 2009
Monday, February 16, 2009
LOGGING INTO ADMISTRATOR WITHOUT PRIVILEGES
The following method will allows you to access any local account including Administrator’s on any Windows 2000 or Windows XP machine. The best thing about this trick is that you don’t have to mess around with password. So, Administrator will never know that anyone else has accessed his account. The following tool will create a god like password which can be used to login to any account. The only thing you’ll need is a CD or DVD-ROM drive.
You need to download a tool called DreamPackPL. It turns off the password protection features in Windows XP, thereby allowing you to log into any account. It’s a ready to burn ISO (4MB only). I do hope you know how to burn a CD. Follow the steps:
1. Burn the ISO into a CD-ROM.
2. Boot the system making the CD-ROM as first boot option in BIOS.
3. Boot from the CD.
4. A windows installation console will come up. Press R then C.
5. Backup your original sfcfiles.dll by typing:
“ren C:\Windows\System32\sfcfiles.dll sfcfiles.lld” (without quotes)
6. Copy the hacked file from CD to system32 folder. Type:
“copy H:\i386\pinball.ex_ C:\Windows\System32\sfcfiles.dll” (without quotes and assuming your CD drive is H:)
7. Now type exit, reboot.
8. When you reach the logon screen, enter dreamon as the username or password.
9. The options window will open, there is a setting called God-Password, enable it and type the God Password there.
Dreampackpl Settings
10. Now for any account, type the password which you have set in previous step to login.
You need to download a tool called DreamPackPL. It turns off the password protection features in Windows XP, thereby allowing you to log into any account. It’s a ready to burn ISO (4MB only). I do hope you know how to burn a CD. Follow the steps:
1. Burn the ISO into a CD-ROM.
2. Boot the system making the CD-ROM as first boot option in BIOS.
3. Boot from the CD.
4. A windows installation console will come up. Press R then C.
5. Backup your original sfcfiles.dll by typing:
“ren C:\Windows\System32\sfcfiles.dll sfcfiles.lld” (without quotes)
6. Copy the hacked file from CD to system32 folder. Type:
“copy H:\i386\pinball.ex_ C:\Windows\System32\sfcfiles.dll” (without quotes and assuming your CD drive is H:)
7. Now type exit, reboot.
8. When you reach the logon screen, enter dreamon as the username or password.
9. The options window will open, there is a setting called God-Password, enable it and type the God Password there.
Dreampackpl Settings
10. Now for any account, type the password which you have set in previous step to login.
Spliting Large Files Into Small Files
If you want to share a video or other file, that seems to be too large to upload, you can use a couple of programs to split the file into smaller parts that can be joined later.
Split Files Using Winzip :
One way is using a Zip utility program, such as WinZip. The following information applies to WinZip. If you are using a different program, refer to its help files if you are unsure how to proceed. To split a Zip file into smaller pieces:
1. Open or create the Zip file.
2. Choose Split from the Actions menu.
3. Specify the name to be used for the split Zip file. The name must be different from the name of the open Zip file.
4. Specify the size to be used for the individual parts. You can choose from common sizes using the Part size drop-down list or you can specify your own size. To specify your own size, choose "Other size" in the drop-down list and type the desired size in the Other size field. You can specify the size in bytes, kilobytes (KB), or megabytes (MB); indicate which you're using by clicking the appropriate radio button. For uploading to sendspace, make sure you make the split files less than 300MB each.
5. Click OK to create the split Zip file.
Split Files Using Winrar :
Another program you can use, is WinRar. Right-click on the folder or file you want to split, then choose "Add to archive". A new window pops up, and then you can choose the archive format - RAR or Zip. Zip is a format that can compress the file size a little, but if you want to split the file into a couple of files, you`d better choose RAR. You can also set the compression method (normal will take more time than fastest, for instance) and the most important thing here is "Split to volumes, bytes". Best size for the parts is 100MB - 98 078k - ZIP 100 because you can upload every part without worrying whether it`s bigger than the upload limit, besides it`s most convenient to download. Click "Ok" and wait till the big files is split into 100MB parts.
Here is a list of some freewares to split large files into smaller ones.
1. Rapid Split :
Rapid Split is an easy-to-use, wizard-based file splitting software with step-by-step assistance in splitting process. It enables you to split files of all types into pieces that can be stored on removable storage media such as floppy disk and zip disk.It allows you to specify the file either split by size or number of pieces and you can also use the predefined sizes for common removable storage media. This software has drag-and-drop functionality and command line operation
http://cdn.simtel.net/pub/simtelnet/handheld/compress/dm/download-RapidSplit.exe.exe
2. GSplit :
GSplit is a powerful file splitter that lets you split your large files into a set of smaller files called pieces. These pieces are easier to copy to floppies, distribute over the Internet or through E-mail, share with friends or colleagues, archive to Zip disks or CDs. The pieces can be easily combined, using the generated Self-Uniting Executable, that automatically restores the original file for you without requiring GUnite. GSplit also includes advanced features like different splitting methods CRC32 checks (detects file corruption), splitting logs, keep file information, create specific pieces with your own names and shell integration.
http://www.gdgsoft.com/files/gsplits.exe
3. JR Split :
JR Split File allows you to split a large file into smaller files and create a standard .bat file that can be used to reconstruct a copy of the original file.This function is useful for breaking large text files into more usable segments or for breaking a file into segments to fit on multiple diskettes
Split Files Using Winzip :
One way is using a Zip utility program, such as WinZip. The following information applies to WinZip. If you are using a different program, refer to its help files if you are unsure how to proceed. To split a Zip file into smaller pieces:
1. Open or create the Zip file.
2. Choose Split from the Actions menu.
3. Specify the name to be used for the split Zip file. The name must be different from the name of the open Zip file.
4. Specify the size to be used for the individual parts. You can choose from common sizes using the Part size drop-down list or you can specify your own size. To specify your own size, choose "Other size" in the drop-down list and type the desired size in the Other size field. You can specify the size in bytes, kilobytes (KB), or megabytes (MB); indicate which you're using by clicking the appropriate radio button. For uploading to sendspace, make sure you make the split files less than 300MB each.
5. Click OK to create the split Zip file.
Split Files Using Winrar :
Another program you can use, is WinRar. Right-click on the folder or file you want to split, then choose "Add to archive". A new window pops up, and then you can choose the archive format - RAR or Zip. Zip is a format that can compress the file size a little, but if you want to split the file into a couple of files, you`d better choose RAR. You can also set the compression method (normal will take more time than fastest, for instance) and the most important thing here is "Split to volumes, bytes". Best size for the parts is 100MB - 98 078k - ZIP 100 because you can upload every part without worrying whether it`s bigger than the upload limit, besides it`s most convenient to download. Click "Ok" and wait till the big files is split into 100MB parts.
Here is a list of some freewares to split large files into smaller ones.
1. Rapid Split :
Rapid Split is an easy-to-use, wizard-based file splitting software with step-by-step assistance in splitting process. It enables you to split files of all types into pieces that can be stored on removable storage media such as floppy disk and zip disk.It allows you to specify the file either split by size or number of pieces and you can also use the predefined sizes for common removable storage media. This software has drag-and-drop functionality and command line operation
http://cdn.simtel.net/pub/simtelnet/handheld/compress/dm/download-RapidSplit.exe.exe
2. GSplit :
GSplit is a powerful file splitter that lets you split your large files into a set of smaller files called pieces. These pieces are easier to copy to floppies, distribute over the Internet or through E-mail, share with friends or colleagues, archive to Zip disks or CDs. The pieces can be easily combined, using the generated Self-Uniting Executable, that automatically restores the original file for you without requiring GUnite. GSplit also includes advanced features like different splitting methods CRC32 checks (detects file corruption), splitting logs, keep file information, create specific pieces with your own names and shell integration.
http://www.gdgsoft.com/files/gsplits.exe
3. JR Split :
JR Split File allows you to split a large file into smaller files and create a standard .bat file that can be used to reconstruct a copy of the original file.This function is useful for breaking large text files into more usable segments or for breaking a file into segments to fit on multiple diskettes
Sunday, February 15, 2009
HOW TO SAFELY UNINSTALL LINUX WHEN DUAL BOOTED WITH WINDOWS
How to do it:
1. Reboot your laptop/PC with windows 98 start up disc or Windows XP CD and type the command “fixmbr”.
2. Above command will repair ur bootloader and rewrite ntldr which will replace grub loader of Linux and now you can see only Windows XP in the boot menu.
3. Now Boot up in Windows xp.
4. Go to Start > Control Panel > Administrative Tools > Computer Management
5. Go to Disk Management under “Storage”
6. Select your Hard Disk and then the linux partition.
7. Delete the linux partition this will delete linux and grub.
8. Thats it done now boot your laptop or desktop normally it will be booted by default in windows xp.
If you have any problem in the procedure given above leave a comment here…
1. Reboot your laptop/PC with windows 98 start up disc or Windows XP CD and type the command “fixmbr”.
2. Above command will repair ur bootloader and rewrite ntldr which will replace grub loader of Linux and now you can see only Windows XP in the boot menu.
3. Now Boot up in Windows xp.
4. Go to Start > Control Panel > Administrative Tools > Computer Management
5. Go to Disk Management under “Storage”
6. Select your Hard Disk and then the linux partition.
7. Delete the linux partition this will delete linux and grub.
8. Thats it done now boot your laptop or desktop normally it will be booted by default in windows xp.
If you have any problem in the procedure given above leave a comment here…
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