Strange http redirection, need help!

[om28]

I run into a very strange problem on my powerbook. I use the mac since 20 years and never had such thing. Each time I try to access a site (any site) with the ".de" TLD (domain for Germany), my request is redirected at the site "www.auktionen-9.de". I can access any other site in the world (well, I did not tried all domains...) except with the domain de. This is happening in several countries with different providers, so it is not a router problem.
Now, the strange thing is that only occurs while I am connected with a Wi-Fi connection. If I connect through the GSM network with 3G (I used a 3G data card with Launch2Net), no problem, in that case I can access any site. What is modifying my DNS settings when connecting with Airport ?
I know there are no viruses, but perhaps a new trojan?
Thanks for any help...
Olivier

 

[Satcomer]

Well it's time to check. In you Mac check this Macworld article. Then go to your router and follow the steps to use on your Mac and your router. In OpenDNS make a free account and controll your DNS. This way you can block phishing sites and any site you want.

 

[om28]

Just found it. After checking for hours, trying several anti-virus, etc., it appears that it was a faulty DNS server. I manually changed my default DNS server and it worked. And during a 3G data card connection the DNS server is automatically another one, which I did not realized.
Never thought that a DNS server would be hacked this way...
Olivier