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Last Updated on July 12, 2026 by skraito with Lord Jesus Christ

To run BIND securely in a chroot jail on Red Hat Enterprise Linux (RHEL), use the official bind-chroot package. This eliminates the need to manually build the jail directory structure, copy libraries, or create device nodes. [1, 2]

1. Install Required Packages

First, install the main BIND server and the chroot wrapper:

bash

sudo dnf install bind bind-chroot bind-utils -y

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2. Enable the Chroot Service

Stop the default unchrooted service, and enable the chroot-specific service so it automatically mounts and runs in the jail upon boot:

bash

sudo systemctl disable named
sudo systemctl enable named-chroot

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3. Manage Configuration Files

The chroot environment mirrors your system structure but places BIND inside a restricted root.

• Primary Config File: Edit /etc/named.conf as usual.
• Chroot Directory: BIND’s actual chroot directory path is located at /var/named/chroot/etc/.
• Zone Files: Place your zone files in /var/named/chroot/var/named/.

If you already have a working configuration outside of chroot, copy your configuration files into the chroot directory:

bash

sudo cp /etc/named.conf /var/named/chroot/etc/named.conf
sudo cp /var/named/* /var/named/chroot/var/named/

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4. Verify Syntax

Always check that your configuration syntax is correct before starting the service:

bash

sudo named-checkconf /var/named/chroot/etc/named.conf

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5. Start the BIND Service

Start the chroot-enabled named daemon:

bash

sudo systemctl start named-chroot

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6. Update Firewall Rules

Ensure your firewall is permitting DNS traffic on port 53:

bash

sudo firewall-cmd --add-service=dns --permanent
sudo firewall-cmd --reload

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