Are you getting AppArmor bind permission denied? Here’s how to fix it.

Usually, this error occurs mainly due to incorrect bind permission errors.

At Bobcares, we often receive requests to fix this error as part of our Server Management Services.

Today, let’s discuss this error in detail and see how or Support Engineers fix it.

Why does “AppArmor bind permission denied” error occurs?

Before getting into the error, let’s first discuss about AppArmor.

AppArmor abbreviated as Application Armor is a Linux kernel security module.

We use it to restrict program capabilities and also it locks down vulnerable processes, restricting the damage these processes can cause.

Moreover, it is an alternative to SELinux.

We’ve seen many of our customers experiencing this error due to incorrect bind permissions.

How we fix “AppArmor bind permission denied” error?

So far we have discussed the error in detail. Now, let’s discuss the solution to it.

Recently, one of our customers approached us with an AppArmor error. He tried to run bind9 with chroot jail but ended up with “Permission Denied” errors.

Also, he ensured that the owner of this file is user bind, and it has the read/write access to it.

Fixing the permission denied error

Our Support Engineers checked the error in detail and found permission errors.

To access files in chroot, we need to edit /etc/apparmor.d/usr.sbin.named to give Bind permissions.

We need to modify all the paths specified there that have been prefixed by the chroot location. We give the permissions using the command,

/var/named/** r

After making the changes, we reload the service using the command,

service apparmor reload

This will resolve the error and AppArmor works fine then on.

[Need more assistance to resolve this error?- We’ll help you.]

Conclusion

In short, AppArmor bind permission denied occurs mainly due to incorrect bind permission errors. In today’s writeup, we discussed this error in depth and saw how our Support Engineers fix it for our customers.