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I want to prevent certain applications from accessing the internet. When I was using windows XP I had an application (i think it was Zone alarm) which always notified me when an application tried to access the internet. I wonder if there is an application in Ubuntu which would do the same task. If it is possible, please suggest a gui application.

the problem is, my internet provider allows me to connect to a single host at a time, that means no two applications can use internet at the same time. When i checked system monitor it showing me that internet is working fine still my browser cant browse.So i want to kill the other application using the internet to browse.

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Possible duplicate. askubuntu.com/questions/9206/… –  Basharat Sialvi Apr 27 '12 at 17:57
    
Arun, you should edit your post to mention the application. Was it a firewall? I know that firewalls in Windows allow users to control which applications can access the internet. –  user25656 Apr 27 '12 at 18:18
    
For Iphone - Disable the mobile data. Go to Setting, General, and off the Cellular-mobile data –  user164503 Jun 5 '13 at 0:10

1 Answer 1

You can use apparmor.

AppArmor ("Application Armor") is a security module for the Linux kernel, which allows the system administrator to associate with each program a security profile that restricts the capabilities of that program.

You can use deny statements to prevent applications to access network. Take a look into this tutorial for more information.

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