How to unblock a device from Wi-Fi?

I accidently blocked my iphone 4 from accessing my Wi-Fi, and even though i put in my password and it allows me into the network on my phone, it does not let me do anything on the internet, or anything that requires internet… How do i unblock it from my computer?

Same way you blocked it in the first place - log back into the router that is doing the blocking, and remove the block you have put in. Worst case, reset the router to factory default and start all over again…

Sounds like someone has turned on some firewall blocking in the router for that specific device (iphone)