Connecting two buildings to one broadband service

Two into one is possible.

By Ron Nutter, Network World (US)

I need to connect two buildings which are 100 metres apart. Both buildings are using wireless networks and one has an ADSL modem. I want to ensure both buildings can access the LAN to use shared resources and the Internet through the single ADSL connection. -- Charles 

Before getting started, look at the total number of users you will have on one connection and compare that against the speed of your DSL. Depending on your level of service, you may want to increase the speed if you can (this will depend on how far your location is from the central office providing you with DSL). See if you can get broadband service from the cable company. More cable companies are beginning to provide this type of service to companies. You may be able to get better Internet performance for the same money or just a little bit more than you are currently paying.

Given the short distance between the buildings, see if you can get a dry copper pair between them. This needs to be a line with no "conditioning" voltage or dial tone on it. If you can get this, look at companies such as Blackbox, which offer Ethernet and network extenders. They can use a copper pair to create what amounts to a private DSL connection between both ends to give you a pretty decent connection speed - and without the monthly cost of a second broadband connection for the second building (while putting in a second broadband connection is an option, it will also complicate the ability to share files and do other tasks normally associated with a LAN).

If getting a dry pair for a network connection or a second broadband connection isn't an option, consider using a wireless link between the buildings. You will need to see if there is a direct line of sight between buildings, preferably with no obstructions such as trees. Trees (or even tall bushes) can attenuate the signal between access points/bridges to the point where the wireless link could be intermittent.

If you do have a clear view between buildings, you will want to look at some type of external antenna to use for the inter-building link. You will need a directional antenna to concentrate the signal to where you want it to be, so you don't become an ISP to the neighbours. One place to look for antennas is www.hyperlinktech.com. They have a good assortment to choose from, as well as folks who can assist with choosing the best antenna for your application.  Once you have the antenna, you will need to look at using a bridge to connect the two locations. Most access points don't have bridging built in, so look at dedicated devices, which typically will cost you a bit more than your average access point. An alternative is to go with a Linksys WRT54-GL access point and open-source firmware such as DD-WRT, which includes a Wireless Distribution System function.

As with any wireless connection, I can't stress strongly enough the need to use as strong encryption as possible, to keep somebody from intercepting your wireless traffic. Since you already have wireless running in both buildings, you will need to select a different channel for your bridge connection. For example, if you are using channel 6 for your in-building wireless, you could use either channel 1 or 11 for the bridge connection.

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How to connect two computers - Windows envirnoment

I know alot of you might read this and say that im just opying and pasting, its true but i am the author so i can post it where i want... I know this is not got to do with hacking or cracking but most of my articles will be educational hope it helps ;)



Okay so why write about it? Well because there was once a time that i needed to know how to connect two computers together and I couldn't find any articles to help me and no links on the internet that had it in detail, so this is for the people that might experience the same.

So let's begin!



Firstly you will need to know how exactly your two PC's are going to connect. So here it is. The computers will connect directly to each other therefore no hub will be needed. For those of you that don't know, a hub is just a device that connects computers in a network via UTP STRAIGHT THROUGH cables.



The reason why I wrote straight through in caps is because this is not what you will be using to connect the two computers. Instead you will be using cross over cables. You can get this from a local computer store for relatively cheap. Or if you feel like doing work then make it, its really easy. If you need any help, then a Google search on how to make crossover cables will help alot. The reason why I don't tell you how, because I'm telling you how to connect two computers not create crossovers.



Anyways that's all the requirements you'll need, just a cross over cable. (Please note; if you buying or making a cross over, make sure it's at least cat5e UTP cables.)

Now that we got that out of the way, let's get to work!



Step1

On each computer, right click on "My Computer". Click Properties and then click on the "Computer Name" tab. Where it says "Computer description:" Give each computer a description (It must not be the same). Now click on the "change" so that you can change the name of the computer and create a workgroup. In the name option give it the same name you gave it for its description and in the workgroup section type in "my first network" (REMEMBER: Names of the computers should NOT be the same, BUT Workgroup names should be EXACT the same on both) Now once you change these, you will be asked to restart the computer, so simply click yes or ok, whatever you are prompted with.



Step 2

After the computers are rebooted you will need to setup IP addresses for each computer. This is how:

On your desktop, look for the icon named "My Network Places". Now dpouble click it to open it.

Once open look on the left to see an option "view network connections" and click on it.

Now right click on local area network and click properties.

Where it says "This connection uses the following items:"; scroll down to "Iternet Protocol (TCP/IP)", click on it and click the properties button.

Now click on "Use the following IP address" and at "IP Address" type in an IP address e.g 192.168.0.1.

Although you do the same steps for both computers you must have different IP addresses so you can make the second computers IP address 192.168.0.2

After you set the IP addresses just press the tab button and you should get a number in the subnet mask as 255.255.255.0, then press ok and wait a while and now you almost done!



Step 3

This is the easiest part; just take you cross over cable and connect to each computers network card RJ45 port. That's it you now will be able to see the computers in "My Network Places". You may start sharing files!

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How to Extract text from PDF, DOC, HTML, CHM, and RTF files

You can use Text-Mining-Tool to automatically extract text from a PDF file so that you can use it in any program freely. Or if you cannot open a PDF file because you do not have a PDF viewer installed, you can use this tool to extract the text and read the document.



Text Mining Tool is completely free and does not even require an installation, simply unzip it and run the program to use it.



text mining tool



Click the Open button and choose your file that you want to convert to text. Click ok and the large window below the buttons will eventually fill with all of the text extracted from the document.



extract text



Click Save to save the extracted text to your computer. You can also click Clipboard to copy the mined text to the Windows clipboard.



For convenience, the following hotkeys can be used to perform the operations:



* Open - F3 or O.

* Save - F2 or S.

* Clipboard - F5 or C.

* Exit - F10 or Escape.



You can also use the minetext console tool to create a batch script for extracting text from multiple files. This can be useful if you have a directory with a large number of files that need to have text extracted.

-



If you’re a web designer, this program can be very useful to grab the text from a Word document without getting all of the extra Microsoft Office styling code included with the text.



This is a very simple program that is very simple to use! It has one basic purpose and it does a good job! Enjoy!

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How to Extract text from PDF, DOC, HTML, CHM, and RTF files

You can use Text-Mining-Tool to automatically extract text from a PDF file so that you can use it in any program freely. Or if you cannot open a PDF file because you do not have a PDF viewer installed, you can use this tool to extract the text and read the document.



Text Mining Tool is completely free and does not even require an installation, simply unzip it and run the program to use it.



text mining tool



Click the Open button and choose your file that you want to convert to text. Click ok and the large window below the buttons will eventually fill with all of the text extracted from the document.



extract text



Click Save to save the extracted text to your computer. You can also click Clipboard to copy the mined text to the Windows clipboard.



For convenience, the following hotkeys can be used to perform the operations:



* Open - F3 or O.

* Save - F2 or S.

* Clipboard - F5 or C.

* Exit - F10 or Escape.



You can also use the minetext console tool to create a batch script for extracting text from multiple files. This can be useful if you have a directory with a large number of files that need to have text extracted.

-



If you’re a web designer, this program can be very useful to grab the text from a Word document without getting all of the extra Microsoft Office styling code included with the text.



This is a very simple program that is very simple to use! It has one basic purpose and it does a good job! Enjoy!

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How to make your application run when windows loads

Ok this one isn't to hard, you just need to learn how to use the registry API functions... I'm not going to go over what the windows registry is, if you don't know i advise you google it Wink.



In the registry there is a (path)key that windows reads, in that key is a list of sub-keys, there values contain file paths which are executed when windows loads, so in order to make our server load on startup we just need to add a sub-key into this key containing the path to our server, make sense Wink.





In order to do this the first thing we need to do is declare an object to hold data for subsequent calls to the registry functions.

// this is the object were use for subsequent registry function calls...

HKEY key1;

Secondly we need to open the Registry path(key) that contains the list of programs that will startup, this being "HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurrentVersionRun".

Ok this is the code we use to open that registry path(key)

RegOpenKeyEx(HKEY_LOCAL_MACHINE, // the root key we want to open

"Software\Microsoft\Windows\CurrentVersion\Run", // that path(key) we want to open

0, // dont worry about this one, we just leave it null(0)

KEY_SET_VALUE, // the access right we wwant when opening the key

&key1); // our registry object we created ealier, were need for subsequent calls

Ok now we've opened the registry key, we need to create a value in it that contains the full path to our server.

RegSetValueEx(key1, // the registry object we used in the call to RegOpenKeyEx(...)

"Name-Of-Key-To-Create", // the name of the key that will be created

0, // we dont need to use this so we leave it null

REG_SZ, // the type of key were creating, it will hold the path to our server so its a string value

(const unsigned char*)"path to our server", // the value of the key were creating

strlen("path to our server")); // number of letters used in the value of our key

Now all we need to do is close the key we opened and were done Very Happy,

this is simple, code below:

RegCloseKey(key1); // close the key we opened ealier...

Ok i've gone through what we need to do and what functions we need to do to it, but there's one thing i hate, and thats when some ends a tut here, without showing what the finished version would look like... so here's what it should look like if you've done everything correct :D.

int main()

{

HKEY key1;

RegOpenKeyEx(HKEY_LOCAL_MACHINE,"Software\Microsoft\Windows\CurrentVersion\Run",0,KEY_SET_VALUE, &key1);

RegSetValueEx(key1, "key-name",0,REG_SZ,(const unsigned char*)"path to my server",strlen("path to my server"));

RegCloseKey(key1);



return 0;

}

and there ya have it, a simple method to make your server run on startup Wink. If you can think of any ways to improve this tutorial let me know Wink, hopefully your learned something from this tut Smile, any questions just reply and ill be happy to answer them, peace out, KOrUPt.

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Orkut Scrap Helper

FireFox Extention)
It is an FireFox extention made by an indian named Ajay Martin.
Features:
Scrap those who have scrapped you in a single step!
Persistant link to Your scrapbook.
NOTE: You must be logged in to orkut to use this tool.
Download
works with : - Firefox 1.0+ - 1.6


Download Scrap Helper

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Places That Viruses and Trojans hide on startup

This article is taken from http://www.governmentsecurity.org
you may find it a good read

1. START-UP FOLDER. This applies to all versions of Windows, Windows9x has a global startup folder and WinXP/2K has a per user and all users startup folder.

c:Documents and SettingsAll UsersStart MenuProgramsStartup

And

c:Documents and SettingsusernameStart MenuProgramsStartup

Windows opens every item in the Startup folder on startup/login, this folder is easy to find and you can just 'right click and delete' to remove items from it.

Note the above says 'open' not 'run' this means if there is a .txt file, notepad will open, if there is a .wav file the default program for handling .wav files will open and so on. Shortcuts are usually put in the startup folder but entire programs/documents/files can be put there.

STARTUP ORDER FOR WINDOWS NT4/2000/XP

User enters a password and logon to the system

2. REGISTRY. Windows executes all instructions in the "Run" section of the Windows Registry. Items in the "Run" section (and in other parts of the Registry listed below) can be programs or files that programs open (documents), as explained in No. 1 above.

All Run Keys:

[HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurr entVersionRunOnce]

[HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurr entVersionRun]

[HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurr entVersionRunOnceEx]

[HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurr entVersionRunEx]

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurre ntVersionRunOnce]

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurre ntVersionRun]

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurre ntVersionRunOnceEx]

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurre ntVersionRunEx]

3. REGISTRY. Windows executes all instructions in the "RunServices" section of the Registry.

Computer Management -> Services - items set to "Automatic"

4. REGISTRY. Windows executes all instructions in the "RunOnce" part of the Registry.

5. REGISTRY. Windows executes instructions in the "RunServicesOnce" section of the Registry. (Windows uses the two "RunOnce" sections to run programs a single time only, usually on the next bootup after a program installation.)

7. REGISTRY. Windows executes instructions in the HKEY_CLASSES_ROOTexefileshellopencommand "%1" %* section of the Registry. Any command imbedded here will open when any exe file is executed.

Other possibles:

[HKEY_CLASSES_ROOTexefileshellopencommand] =""%1" %*"
[HKEY_CLASSES_ROOTcomfileshellopencommand] =""%1" %*"
[HKEY_CLASSES_ROOTbatfileshellopencommand] =""%1" %*"
[HKEY_CLASSES_ROOThtafileShellOpenCommand] =""%1" %*"
[HKEY_CLASSES_ROOTpiffileshellopencommand] =""%1" %*"
[HKEY_LOCAL_MACHINESoftwareCLASSESbatfileshell opencommand] =""%1"
%*"
[HKEY_LOCAL_MACHINESoftwareCLASSEScomfileshell opencommand] =""%1"
%*"
[HKEY_LOCAL_MACHINESoftwareCLASSESexefileshell opencommand] =""%1"
%*"
[HKEY_LOCAL_MACHINESoftwareCLASSEShtafileShell OpenCommand] =""%1"
%*"
[HKEY_LOCAL_MACHINESoftwareCLASSESpiffileshell opencommand] =""%1"
%*"

If keys don't have the ""%1" %*" value as shown, and are changed to something like ""somefilename.exe %1" %*" than they are automatically invoking the specified file.

8. BATCH FILE. Windows executes all instructions in the Winstart batch file, located in the Windows folder. (This file is unknown to nearly all Windows users and most Windows experts, and might not exist on your system. You can easily create it, however. Note that some versions of Windows call the Windows folder the "WinNT" folder.) The full filename is WINSTART.BAT.

9. INITIALIZATION FILE. Windows executes instructions in the "RUN=" line in the WIN.INI file, located in the Windows (or WinNT) folder.

10. INITIALIZATION FILE. Windows executes instructions in the "LOAD=" line in the WIN.INI file, located in the Windows (or WinNT) folder.

It also runs things in shell= in System.ini or c:windowssystem.ini:

[boot]
shell=explorer.exe C:windowsfilename

The file name following explorer.exe will start whenever Windows starts.

As with Win.ini, file names might be preceeded by considerable space on such a line, to reduce the chance that they will be seen. Normally, the full path of the file will be included in this entry. If not, check the Windows directory


11. RELAUNCHING. Windows reruns programs that were running when Windows shut down. Windows cannot do this with most non-Microsoft programs, but it will do it easily with Internet Explorer and with Windows Explorer, the file-and-folder manager built into Windows. If you have Internet Explorer open when you shut Windows down, Windows will reopen IE with the same page open when you boot up again. (If this does not happen on your Windows PC, someone has turned that feature off. Use Tweak UI, the free Microsoft Windows user interface manager, to reactivate "Remember Explorer settings," or whatever it is called in your version of Windows.)

12. TASK SCHEDULER. Windows executes autorun instructions in the Windows Task Scheduler (or any other scheduler that supplements or replaces the Task Scheduler). The Task Scheduler is an official part of all Windows versions except the first version of Windows 95, but is included in Windows 95 if the Microsoft Plus Pack was installed.

13. SECONDARY INSTRUCTIONS. Programs that Windows launches at startup are free to launch separate programs on their own. Technically, these are not programs that Windows launches, but they are often indistinguishable from ordinary auto-running programs if they are launched right after their "parent" programs run.

14. C:EXPLORER.EXE METHOD.

C:Explorer.exe

Windows loads explorer.exe (typically located in the Windows directory)during the boot process. However, if c:explorer.exe exists, it will be executed instead of the Windows explorer.exe. If c:explorer.exe is corrupt, the user will effectively be locked out of their system after they reboot.

If c:explorer.exe is a trojan, it will be executed. Unlike all other autostart methods, there is no need for any file or registry changes - the file just simply has to be named c:explorer.exe

15. ADDITIONAL METHODS.

Additional autostart methods. The first two are used by Trojan SubSeven 2.2.

HKEY_LOCAL_MACHINESoftwareMicrosoftActive SetupInstalled Components
HKEY_LOCAL_MACHINESoftwareMicrosoftWindowsCurr entversionexplorerUsershell folders

Icq Inet
[HKEY_CURRENT_USERSoftwareMirabilisICQAgentApp stest]
"Path"="test.exe"
"Startup"="c:\test"
"Parameters"=""
"Enable"="Yes"

[HKEY_CURRENT_USERSoftwareMirabilisICQAgentApp s]
This key specifies that all applications will be executed if ICQNET Detects an Internet Connection.

[HKEY_LOCAL_MACHINESoftwareCLASSESShellScrap] ="Scrap object"
"NeverShowExt"=""
This key changes your file's specified extension.

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetContro lSession ManagerBootExecute]

This is the first thing that is run.

[HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsNTCu rrentVersionWinlogonUserInit]

[HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionWinlogonShell]