From: "Bruno LAURET" <bruno dot lauret at semita dot fr>

> It's not simple because the hypertext link is in my login page.

> 3 - In my login page i've a hypertext link to www.yahoo.com (ip
> address is in 'allowed' list on the captive portal page) but when i
> clic on befor authentification, the link is
> http://www.google.com/www.yahoo.com !!!

Very odd...  I have not seen this.  What version are you running?