--- title: PowerDNS --- [toc] ## Installation For the autoriative server install this package `# apt install pdns-server` This is the PowerDNS resolver package `# apt install pdns-recursor` ### Different Backends can be installed on Debian Mysql Backend `# apt install pdns-backend-mysql mariadb-server` ## Configuration Authoritative Server Set the backend you chose in the `launch=` option of PowerDNS' configuration file. The config can be found under `/etc/powerdns/pdns.conf` For MySQL I chose `launch=gmysql` > A [list of backends can be found here](https://doc.powerdns.com/authoritative/backends/index.html) Add the following parameters below `launch=gmysql` ``` gmysql-host=127.0.0.1 gmysql-socket=/run/mysqld/mysqld.sock gmysql-user=(user) gmysql-password=(password) gmysql-dbname=pdns # Add this for dnssec support gmysql-dnssec=yes ``` Prepare database `# mariadb -u root -p` `CREATE DATABASE pdns;` `GRANT ALL ON pdns.* TO 'pdns'@'localhost' IDENTIFIED BY '';` Import the schema utilised by PowerDNS. This can be done with the user you just created `$ mysql -u pdns -p pdns < /usr/share/doc/pdns-backend-mysql/schema.mysql.sql` `# systemctl restart pdns` ### Zones Create Zone and add a name server `# pdnsutil create-zone (domain) ns1.(domain)` Add "A"-Record. **Mind the (.) after the domain** "Name" is the hostname you wish to assign. `# pdnsutil add-record (domain). (name) A (ip address)` ### Dynamic DNS `# apt install bind9utils` Generate key `# dnssec-keygen -a hmac-md5 -b 128 -n USER (keyname)` Edit the configuration file and change `dnsupdate=no` to `dnsupdate=yes` and set `allow-dnsupdate-from=` to empty. Allow updates from your DHCP server `# pdnsutil set-meta (domain) ALLOW-DNSUPDATE-FROM (dhcp server ip)` If you set up a reverse-zone, also allow that `# pdnsutil set-meta (reverse ip).in-addr.arpa ALLOW-DNSUPDATE-FROM (dhcp server ip)` Import the key `# pdnsutil import-tsig-key (keyname) hmac-md5 (key)` Enable for domain `# pdnsutil set-meta (domain) TSIG-ALLOW-DNSUPDATE (keyname)` And for reverse-zone `# pdnsutil set-meta (reverse ip).in-addr.arpa TSIG-ALLOW-DNSUPDATE (keyname)` You also have to configure the DHCP server to provide updates, see [the DHCP article](https://wiki.realstickman.net/en/linux/services/dhcp-server) #### Testing with nsupdate `# nsupdate -k Kdhcpdupdate.+157+12673.key` ``` > server 127.0.0.1 5300 > zone testpdns > update add test.testpdns 3600 A 192.168.7.10 > send ``` ## Configuration Recursive Resolver The config file can be found under `/etc/powerdns/recursor.conf` In `/etc/powerdns/pdns.conf` set `local-address=127.0.0.1` and `local-port=5300` to allow the recursor to run on port 53 In `/etc/powerdns/recursor.conf` set `forward-zones=(domain)=127.0.0.1:5300` to forward queries for that domain to the authoritative DNS Also set `local-address` and `allow-from` To bind to all interfaces, use `local-address=::,0.0.0.0` ### Wipe Cache `# rec_control wipe-cache $` ## DNSSEC ### Authoritative Server > *TODO* > https://doc.powerdns.com/authoritative/dnssec/index.html ### Recursor Server To fully enable DNSSEC, set `dnssec=process-no-validate` to `dnssec=validate` To allow a domain without DNSSEC, modify `/etc/powerdns/recursor.lua` Add `addNTA('(domain)')` to disable DNSSEC for the selected domain. Show domains with disabled DNSSEC `# rec_control get-ntas` > [DNSSEC Testing](https://wiki.debian.org/DNSSEC#Test_DNSSEC) ## WebGUI ### PowerDNS-Admin `# mkdir /etc/pda-data` `# chmod 777 -R /etc/pda-data` ``` # podman run -d \ --name powerdns-admin \ -e SECRET_KEY='q5dNwUVzbdn6gc7of6DvO0syIhTHVq1t' \ -v /etc/pda-data:/data \ --net=host \ docker://ngoduykhanh/powerdns-admin:latest ``` #### Enabling API A few settings in `/etc/powerdns/pdns.conf` need to be changed. ``` api=yes api-key=(random key) webserver=yes ``` Following this, the API access can be configured in the webgui ![powerdns-admin-api-settings.png](/powerdns-admin-api-settings.png) Now you should see all your configured Domains and be able to modify records #### Systemd Service `/etc/systemd/system/powerdns-admin.service` ``` [Unit] Description=Powerdns Admin Podman container [Service] Restart=always ExecStart=/usr/bin/podman start -a powerdns-admin ExecStop=/usr/bin/podman stop -t 10 powerdns-admin [Install] WantedBy=multi-user.target ``` `# systemctl daemon-reload` `# systemctl enable --now powerdns-admin`