To configure Knot DNS on Debian/Ubuntu, you can follow these steps:
Open the configuration file for Knot DNS by running the following command:
sudo nano /etc/knot/knot.conf
This will open the configuration file in the Nano text editor.
In the server section of the configuration file, you can specify the IP address and port number that Knot DNS will listen on. For example:
server:
listen: [::1, 127.0.0.1]
port: 53
This specifies that Knot DNS will listen on the loopback address and IPv6 address, and use port number 53.
In the zone section of the configuration file, you can define the DNS zones that Knot DNS will serve. For example:
zone:
name: linux-server-admin.com
file: /etc/knot/zones/linux-server-admin.com.zone
This specifies that Knot DNS will serve the zone linux-server-admin.com, and the zone data will be stored in the file /etc/knot/zones/linux-server-admin.com.zone.
You can also configure various other settings for Knot DNS, such as logging and security settings. Refer to the Knot DNS documentation for more information on available configuration options.
After making any changes to the configuration file, save the file and exit the text editor.
Restart the Knot DNS service to apply the new configuration by running the following command:
sudo systemctl restart knot
That’s it! You have now configured Knot DNS on your Debian/Ubuntu system.
The /etc/knot/knot.conf file is the main configuration file for the Knot DNS server. It specifies how the Knot daemon should be configured and how it should operate.
Here are some of the key sections and directives that you might find in a typical knot.conf file:
server section: This section defines global settings for the Knot daemon, such as the listen addresses, the number of worker threads, and the logging settings.
template section: This section defines reusable templates for zone configuration, which can be used to simplify the configuration of multiple zones.
zone section: This section defines the individual zones that the Knot DNS server is authoritative for, including their name, type, and configuration options.
include directive: This directive allows you to include additional configuration files from other locations, making it easy to split up large configurations into smaller, more manageable pieces.
key and acl sections: These sections define cryptographic keys and access control lists that can be used to secure the Knot DNS server.
Here is an example knot.conf file that demonstrates some of these directives:
# Global server settings
server:
listen: [ "::", "0.0.0.0" ]
workers: 4
log:
- target: syslog
severity: info
- target: stderr
severity: warning
# Zone templates
template:
- id: default
storage: "/var/lib/knot/zones/%s.zone"
# Zone configurations
zone:
- domain: "linux-server-admin.com"
template: default
file: "/var/lib/knot/zones/linux-server-admin.com.zone"
allow-notify: [ 192.168.1.1, 192.168.1.2 ]
allow-transfer: [ 192.168.1.0/24 ]
# Include additional configuration files
include: "/etc/knot/keys.conf"
# Cryptographic keys
key:
- id: linux-server-admin.com
algorithm: hmac-sha256
secret: "mysecretkey"
# Access control lists
acl:
- id: internal
net: 192.168.1.0/24
This configuration file listens on all IPv6 and IPv4 addresses, uses four worker threads, and logs informational messages to syslog and warning messages to stderr.
It defines a zone template named “default” that specifies the storage location for zone files, and a single zone for the “linux-server-admin.com” domain that uses the “default” template and specifies allowed NOTIFY and AXFR sources.
The include directive is used to include an additional configuration file for cryptographic keys, and the key section defines a single HMAC-SHA256 key for the “example.com” zone.
Finally, the acl section defines a single ACL named “internal” that allows access from the 192.168.1.0/24 subnet.