Does iOS support a built-in firewall like macOS does? I don't see anything about it in Settings.
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Why? What are you trying to accomplish?– jabergApr 9, 2012 at 14:40
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1Would be nice to have a Firewall enabled when using a public wifi hot spot, etc.– MrDanielApr 9, 2012 at 15:41
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2Again, why? Apps are sandboxed. Un-needed ports are blocked. What specifically are you trying to accomplish?– jabergApr 9, 2012 at 15:43
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1Just an extra layer of security, having a iOS device saying I am here and I have ports open does not seem wise– MrDanielApr 9, 2012 at 15:57
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3I've had folks at DC612 (the local Defcon SIG) try various scanning tools against my iPhone and they haven't come up with anything useful. Not a definitive answer I realize, but it seems to me you're chasing dragons. Best of luck.– jabergApr 9, 2012 at 16:15
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2 Answers
Page 27 of the September 2015 iOS Security White Paper states that there is not a firewall on iOS.
On other platforms, firewall software is needed to protect open communication ports against intrusion. Because iOS achieves a reduced attack surface by limiting listening ports and removing unnecessary network utilities such as telnet, shells, or a web server, no additional firewall software is needed on iOS devices.
answered Apr 9, 2012 at 17:50
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How did you find out about "All ports are dynamically blocked on iOS to incoming traffic until an app needs specific access"– MrDanielApr 16, 2012 at 21:07
When you have jail broken your iPhone/iPod/iPad you can download a firewall setting in cydia
You can find an article about it here:
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Welcome to Ask Different, Xcodeuser!! Thanks for posting an answer. Can you please add a little more information, such as a link to the firewall setting tweak? Thanks! Apr 9, 2012 at 16:12