No Jailbreak Firewall for iOS (iPhone) for iOS 7 Is there a non jailbreak firewall for the iPhone or is there some way to set one up, somehow?
As of now, and for the foreseeable future, it is not possible for 3rd party developers to create a firewall app.   

Apple need to do it, and my personal guess is they will not, since even for the mac os x the firewall "configuration" the os itself provides, is minimal.   

I think Apple is still in the mindset that you can build a bulletproof ecosystem of OS and apps (which IMHO very very very naive).   

I wish there was a version of little snitch that you could run on iphone. I would jailbreak my devices in an instant if there was one.