networking - Network in Simulator IOS -

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i'm newbie of ios. have problem network of ios simulator. i'll explain more detail below.

i have url abc.com/infor.json want read information of app before display main screen.
have network : network a, network b
far know, simulator using same network macbook.

  1. mac connect network a:
    • safari of mac , safari of simulator can open url
    • application can read information url -> app works fine !
  2. mac connect network b:
    • safari of mac , safari of simulator can open url
    • application can read information url -> app does not work!

i don't know reason in problem
- of course , it's not app's problem -> because app works fine network a
- if network b has proxy'problem -> why url can open simulator's safari

please me resolve it.
thank


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