In a ctmagazine from 2007 I found a nice cgi/iptables script to redirect every first visit to a welcome page.
When I'm new, my mac is not on the list, and I browse for example to http://www.howtoforge.com
I'm redirected to the welcomepage.
After visiting the welcome page the mac is added to the allowed list and you can visit the pages on the web.
This works except
after visiting the welcomepage I can browse every page I want (like ispconfig.org) except the domain I tried to visit when the mac wasn't on the list.
I have to close the browser and restart to browse to http://www.howtoforge.com
in this example
How to fix this?