How to prevent a dialer to take over

If you are browsing by modem, than you have the possibility that a dialer will change the settings of your modem-connection and divert it to an expensive location (romania for example where it has grown in to a real business). You will only see it in your telecom bill which will be enormous and you can complain, but in many cases you will have to pay up and try to get your money back later.
In most of the cases you have gotten a dialer because you are surfing on porn, hack or cracked software sites. These used to be free, but are more and more using the dialer recieves percentage of communication business model to earn many bucks.
http://theregister.co.uk/content/6/35605.html the war against dialers
protect your modem the modem redial scam
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tools
DialerSpy is free software for controling modem connections, goes out from computer. It effective protects against illegal phone connections, defined by the user. http://freeware.it-mate.co.uk/gt.asp?t=http://freeware.it-mate.co.uk/downloads/dspy1_0en.exe

This Small Application checks every couple of seconds to see if your dialup connections change this is very very usefull.As Soon As A Dialer Sets Up A Connection The Pogram Warns You http://www.dialerdoctor.com/down/down.htm

http://www.wardial.net/benefits.html modemscan