Weird AppArmor Behavior Prevents Network Reach: Compiling AppArmor Sources
In this article, we will explore the peculiar behavior of AppArmor when trying to compile the GUI version of AppArmor, specifically version 4.0.0~alpha2-0ubuntu5amd64, using the AppAnvil source code available on GitHub. The issue arises when AppArmor is turned off and then disabled in the system, leading to a lack of network reach.
What is AppArmor?
AppArmor is a mandatory access control framework for Linux that allows applications to be confined to a limited set of resources, such as files, directories, and network ports. This confinement helps to prevent unauthorized access and mitigate the risk of security vulnerabilities.
Compiling AppArmor Sources
To compile the GUI version of AppArmor, we will use the AppAnvil source code available on GitHub. The following steps will guide you through the process:
- Clone the AppAnvil repository from GitHub:
git clone https://github.com/jack-ullery/AppAnvil.git - Navigate to the AppAnvil directory:
cd AppAnvil - Install the required dependencies:
sudo apt-get install build-essential libgtk-3-dev libapparmor-dev libpolkit-gobject-1-dev libcap-dev - Compile the source code:
make - Install the compiled binary:
sudo make install
Weird AppArmor Behavior
When trying to compile the GUI version of AppArmor, we encountered a strange issue where the system was unable to reach the network. This issue occurred when AppArmor was turned off and then disabled in the system.
To resolve this issue, we need to ensure that AppArmor is enabled and running on the system. We can do this by running the following commands:
- Check the status of AppArmor:
sudo aa-status - Enable AppArmor:
sudo systemctl enable apparmor - Start AppArmor:
sudo systemctl start apparmor
Compiling the GUI version of AppArmor can be a challenging task, especially when encountering weird behavior related to AppArmor. In this article, we explored the issue of AppArmor being turned off and disabled, leading to a lack of network reach. By ensuring that AppArmor is enabled and running on the system, we can resolve this issue and successfully compile the GUI version of AppArmor.