@Gertjan:
@jeroen234:
most browsers block the popups
Why not explaining on your main Portal web page that users should/could use IE->Utils->Blocking popup windows->Parameters to block publicity-> [[b]add the opt1 IP : i.e. 192.168.2.1] so they would receive a 'disconnect' windows, from pFsense only.
That wouldn't work, as depending on which page the user tried to access the captive portal popup page appears to be from that side and not the pfSense. Try going to google.com when not authenticated. you would have to allow popups from google. next time you hit it by going to myfavouritesite.org and you would have to enable popups from that site…doesn't work. I would rather like to see a single line small frame at the top of the next page after authentication to give the user the possibility to click "open logout popup" along with a note as most browsers allow the popup when the user clicked on it.