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IRC Security

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Downloading Files from IRC

Introduction

The biggest threat to IRC security ironically has nothing to do with the protocol or software itself. It is what people do with IRC, e.g. downloading of illegal files. This can lead to legal problems, trojan horse viruses, denial of service attacks, etc. For your own good, learn these hard facts about file trading.



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IRC File Trading: "Geek-centric way to get free stuff"?

IRC stands for Internet Relay Chat; it was designed to allow people to chat with each other in real time. Think of it as the granddaddy of IM and those AOL or web "chat rooms." mIRC for Windows is the most popular IRC program.

IRC also has some very simple file sending abilities, intended originally for people to send each other a picture or small text file, etc. Recently, experienced IRC users have turned that into an illegal way to trade songs, movies, games, etc., but note that word: experienced. Unlike other peer-to-peer (P2P) file sharing protocols, IRC was never intended for widespread file trading, so it has no official, centralized list of files and no standard commands for trading files. That's why some call IRC the "geek-centric way to get free stuff," which is a polite way of saying file trading is not suitable for new users.

So how do all those 100000s of geeks do it anyway? If you seriously want to know, read on....

Whatever you do, please don't go around randomly asking strangers for files or typing "!list" or "@find". Also, keep in mind that people on IRC help channels are volunteers who are there to answer legitimate IRC questions, not to become your accomplice in crime. If you ignore this advice, you'll find only ridicule or trouble.

You may encounter a user who is attempting to send you files whichare really viruses and trojans. Some of these files may be called Movie.avi.pif, Pretty Park, DMSetup, Links.vbs and others. There are also some malicious devices such as 'backdoors' which will permit others to access your computer. Whatever they are, and whatever they are called, they can and will damage your computer.

The only way you can prevent the transmission of these files is to *always keep your DCC get preferences set to ignore*. In this way you must turn on your DCC get in order to receive a file. *Never accept and run any files from anyone you do not know*.

If you think you are infected please quit all channels you happen to be in. This is to prevent the spreading of the virus. Go immediately to #NoHack, the DALnet channel where virus help can be received. Give this advice to anyone you know who is spreading a virus. If the individual chooses not to go, please find an IRC Operator and tell him/her in which channel this person is spreading the virus.

DALnet has established a prevention system called DCCALLOW which essentially blocks files with extensions that viruses commonly use. Most people do not know that they are sending viruses. If you can, contact them and get them to join #nohack or to scan their computer for viruses. It is not necessary to report these users to IRCops though. Further information on DCCALLOW is available at http://docs.dal.net/docs/misc.html.



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