Hi all,I am trying to add a splash page/ wifi landing page/ wifi agreement page (or whatever the name is) to my network by modifying my dns server.We know this is not the so call correct way to do it, and will not block attacks in a meaningful way. (as they can always use a better DNS server)Here is how my implementation works:1) DHCP point device to use my DNS server2) DNS server reslove all request as an local ip address, in which it host a web server for the agreement page3) After user agree to the terms, DNS server will start resloving the request correctly, thus, user will be able to get to the webIt works on computers, however, when I tested it on iOS devices, here's what happen1) connect iPhone to wifi network2) iPhone tried resolve a number of sites to determine if the system has internet connection3) DNS server reslove all these request as a local web server's ip address, with ttl=14) splash page comes up on iPhone5) user click I agree, and DNS server starts giving out correct ip, the page also redir