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I'm trying to capture data from my iOS device (specifically a troublesome app) and when I configure it to use my laptop on the same wifi as a proxy, I lose all connectivity.

Here's what I did in Burp Suite Free (v1.7.16):

  • Turn off intercept (So the button reads Intercept is off)
  • Under Options, disabled Run on the loopback listener.
  • Added a new listener: All interfaces, port 8080. I left the remaining options defaulted.

On iOS:

  • Added my laptop's IP address as the host, and port 8080 as the port.

It seems like no traffic at all is getting through, whether SSL or not.

Quick edit : The firewall is disabled on my laptop.

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    are you sure you have connection between both machines? can you ping between them? which browser are you using? safari? firefox? I guess your browsers config is ok setting correctly proxy ip, port, etc... – OscarAkaElvis Jan 27 '17 at 18:15
  • @OscarAkaElvis - Looks like I might've just put the cart before the horse. Can't ping from iOS to laptop (using a "ping" app), nor from laptop to iOS. The router here might be doing a VLAN, though on the same subnet. I'll try again from a different router soon. Thanks! – The1nk Jan 27 '17 at 18:42
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    Yeah some times wireless APs have "clients isolation" activated. – OscarAkaElvis Jan 27 '17 at 18:44
  • I'm voting to close this question as off-topic because it looks to be a basic networking problem not a security issue. – schroeder Apr 24 '18 at 20:24
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Set Burp proxy (you can leave the loopback alone for other tasks) all interfaces to a port like 8082. Set your iOS device internet options to proxy to your Burp proxy IP/port. Don't forget to install Burp's certificate on your iDevice for SSL. It'd be the same for Android or any other device.

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You could try setting up wireless hotspot on your laptop and connecting to that. I had issues a few years ago that I never properly resolved trying to connect an android app to my laptop running as the server. Worked fine as a hotspot, couldn't sort it on the wifi. I think it was some firewall setting somewhere but I never got to the bottom of it.

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