Ubuntu – How to prevent certain applications from accessing the internet

firewallinternet

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.

Best Answer

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.

Related Solutions

Ubuntu – How to block internet access for wine applications

There's a nice tutorial on blocking any given program from accessing the Internet on the Ubuntu forums.

Steps

sudo addgroup no-internet  # Create group "no-internet"
sudo adduser $USER no-internet  # Add current user to no-internet

iptables rule to prevent that group from accessing the network

sudo iptables -I OUTPUT 1 -m owner --gid-owner no-internet -j DROP
sudo ip6tables -I OUTPUT 1 -m owner --gid-owner no-internet -j DROP # To also block IPv6 traffic

Process you don't want to have internet access using sg or sudo -g (execute command as different group ID):

sg no-internet -c "processFullPath args"

It basically involves creating a new group, denying it Internet access, and then running any program you want to restrict as that group ID. So in your case, you would just always run wine using the method described in the tutorial.

Ubuntu – Reverse Firewall or Application Firewalls

AppArmor

AppArmor is a Linux Security Module implementation of name-based access controls. AppArmor confines individual programs to a set of listed files and posix 1003.1e draft capabilities.

below link.

https://help.ubuntu.com/community/AppArmor

Best Answer

Related Solutions

Ubuntu – How to block internet access for wine applications

Ubuntu – Reverse Firewall or Application Firewalls

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