Our institute DHCP internet requires an additional web based authentication (go to a page and login) before outside internet can be accessed. When I boot my machine, it automatically registers DHCP address. Then I try to open firefox and go to the page to authenticate. But if my machine has a DHCP address, firefox keeps on waiting without showing the window and I am unable to authenticate. What works for me is that I switch off the DHCP, start firefox (it open immediately) and then switch on the DHCP and do authentication. Can something be done in this case? narayanan