Hacking on telnet explained

Telnet: the Number One Hacker Tool In this Guide you will learn: • What is telnet? • How to telnet • How to get telnet accounts • Why you might not want to telnet
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Hacking on telnet explainedTelnet: the Number One Hacker ToolIn this Guide you will learn: • What is telnet? • How to telnet • How to get telnet accounts • Why you might not want to telnet • How to install a telnet server on your home Windows computer • How to turn off a telnet server on your home Linux computer • How to explore computers using telnet • Why not use a portscanner instead? • How to break into web sites using telnet Where do I type that command? People ask that all the time when they read my earlyGuides to (mostly) Harmless Hacking. I wrote those guides back when the Internet was inits infancy and almost everyone in cyberspace used telnet. However, nowadays you mightnever even hear about telnet, much less use it, unless you are a hacker. So if you are stillwondering about telnet, today is your lucky day.What Is Telnet?Telnet is a protocol that is most commonly used to log into a remote computer. It also isthe single most powerful hacking tool on the planet. With just a telnet client program,you can: • send email • download source code from web sites • send unexpected input to webservers that can give you amazing and sometimes illegal results • give arbitrary input to many other services on Internet host computers • probe the services offered by servers, routers and even peoples home computers.How to TelnetDont know how to telnet? Click the easy telnet links at happyhacker.com and land in themiddle of a real hacker wargame! This should work regardless of your computeroperating system -- if you have an up to date browser, if your online service providergives you a true Internet connection, and if your computer is able to telnet at all.Did those links get you into a telnet session? Were you able to login to a remotecomputer? If yes, congratulations.If not, how can you fix the problem? If no telnet program appeared on your monitor whenyou clicked these links, perhaps your browser is too ancient to allow telnet. Try installingthe latest Netscape browser (). Or, perhaps your operatingsystem does not include a telnet program. In that case, install or reinstall Windows 95 or98. If you own a Mac, get the superb Mac OS X or Linux PPC().If a telnet program came up and failed to connect, possibly the computer you were tryingto telnet into was down or just plain no longer in existence. Or, you may be usingAmerica Online (or a similar extremely poor online service). If so, your simplest solutionmay be to get a better online service provider. Determined to hack using AOL? Seehttp://happyhacker.org/aol.shtml for some ways to make AOL give you atrue Internet connection.OK, so youve managed to telnet for the first time. Presumably you dont want to limityourself to telnet links on web sites. How do you telnet anywhere you want to go?If you have Linux or any other type of Unix (BSD, SCO, Solaris, Sun OS, Irix, Ultrix,etc.) telneting is easy. Just bring up console or shell (or whatever your GUI calls thecommand line interface). At the prompt type:telnet More on Telnet: the Number One Hacker ToolWindows 2000 works pretty much like Unix. See Figure 1 for an example of a Win 2000telnet login. Not shown on the screen was the command telnet 10.0.0.10, which I gaveat the Command (MS-DOS) prompt.Figure 1: Telnet using Windows 2000If you have Windows 95, 98 or NT, to telnet, bring up the MS-DOS prompt (Start -->Programs --> MS-DOS).Click connect then remote system…. In the host name box place the host name or IPaddress of the computer to which you wish to telnet. Leave the Port and Term Typeboxes alone for now.Here is a really important point. Every day people email me complaining that somecomputer wont let them telnet into it. They ask what they are doing wrong. They arentdoing anything wrong: • Maybe the computer they are trying to reach no longer exists. • Maybe the computer they are trying to reach doesnt allow telnet logins. For example, whois.internic.net no longer allows telnet logins on port 23 (the default port). Click here to learn how to telnet into whois.internic.net on the right port for that particular server. • Maybe a firewall is blocking them. • Or maybe they make a telnet connection and the remote computer asks for a user name and password they dont have. Then they email me asking for how to get a login name and password that will work.Newbie note: The owners or administrators of any Internet host computer decide whogets user names and passwords. Believe it or not, about once a week someone emails measking what user name and password their own online service provider has assigned themfor a telnet login. Thats why Im telling people the obvious -- if you want to telnet intoany computer, and you dont have a user name and password, you must ask the owner,administrator of tech support for that system for a user name and password. If they wontgive that to you, they dont want you to have it!You can go to jail warning: If you guess the user name and password, or use acomputer breakin technique to get or create them, or if someone other than an owneror administrator or a legitimate user on that system gives you a user name andpassword, it is against the law to use them. Many computer criminals give out usernames and passwords that they obtained illegally.More on Telnet: the Number One Hacker ToolHow to Get Telnet AccountsOK, so you want to get legal user names and passwords so you can telnet into othercomputers. Here are some of the best ways: • See http://happyhacker.org/links2.shtml#shells for organizations that will give you free shell accounts. You can telnet into these. • Ask Internet Service Providers for shell accounts. Some offer them, although most dont. • Set up a telnet server on your own computer (see instructions below). Yes, once you are ru ...