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--- linux_router:dns_dhcp [2023-05-14 Sun wk19 14:23] – [DHCP / DNS Setup] baumkp
+++ linux_router:dns_dhcp [2023-07-08 Sat wk27 10:56] (current) – [Bind9 Control Nomenclature] baumkp
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 {{tag>linux router dns dhcp bind ip ipv6 radvd host dig nslookup}}
 ======DHCP / DNS Setup======
+=====Outdated=====
+I have moved my DNS and DHCP servers to Docker, [[https://wiki.kptree.net/doku.php?id=docker_notes:docker-dns#docker_-_dns_server|Docker-DNS Server]].  I am still using ISC_Bind9, but am now using ISC_Kea for DHCP as ISC_Bind is no longer supported as of 2022.
+Further to this I am no looking at backups for both these services on my local area network.  Whilst these services worked reliably well, when ever I shutdown the the router with DNS/DHCP servers my LAN would stop working. Hence the need for back-up DNS.
+These notes still have some utility.  I will presumably archive (tl;dr; roll-up) eventually.
+Actually my router that I was running these services was totally lost when upgrading from Debian 11 to Debian 12, circa June 2023. So I had to rebuild from scratch using these various notes.
 This setup was primarily written in 2017 and is based upon ISC Bind9 and ISC DHCP, which are the main internet backbone software used for DNS and DHCP.
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 An interesting older resource is BigDinosaur Blog [[https://blog.bigdinosaur.org/running-bind9-and-isc-dhcp/|Running BIND9 and ISC-DHCP]]. ++Unfortunately, no longer readily available, Kill-9 Ubuntu 16.04 based Router, Part 2 - DHCP| does not seem to be saved on [[https://web.archive.org/|Wayback Machine Internet Archive]], but [[https://web.archive.org/web/20190410000003/https://killtacknine.com/building-an-ubuntu-16-04-router-part-5-dns/|Part 5 - DNS]] is. (As are [[https://web.archive.org/web/20190410005152/https://killtacknine.com/building-an-ubuntu-16-04-router-part-6-remote-access/|Building an Ubuntu 16.04 Router Part 6: Remote Access]], [[https://web.archive.org/web/20190410001839/https://killtacknine.com/building-an-ubuntu-16-04-router-part-7-proxies-and-caching//|Building an Ubuntu 16.04 Router Part 7: Proxies and Caching]] & [[https://web.archive.org/web/20190410000841/https://killtacknine.com/building-an-ubuntu-16-04-router-part-8-monitoring/|Building an Ubuntu 16.04 Router Part 8: Monitoring]].  It looks like parts 2 and 3 are missing only.)++
-Another reference is Lani's Weblog - Make your [[https://lani78.com/2012/07/23/make-your-dhcp-server-dynamically-update-your-dns-records-on-ubuntu-12-04-precise-pangolin/|DHCP server dynamically update your DNS records]] on Ubuntu 12.04 (Precise Pangolin). Also dragon.org.uk [[https://blogging.dragon.org.uk/dns-bind9-dhcp-ubuntu-16-04-2/|DNS with bind9 and DHCP on Ubuntu 16.04]] and DigitalOcean [[https://www.digitalocean.com/community/tutorials/how-to-configure-bind-as-a-private-network-dns-server-on-ubuntu-16-04|How To Configure BIND as a Private Network DNS Server on Ubuntu 16.04]].\\
+Another reference is Lani's Weblog - Make your [[https://lani78.com/2012/07/23/make-your-dhcp-server-dynamically-update-your-dns-records-on-ubuntu-12-04-precise-pangolin/|DHCP server dynamically update your DNS records]] on Ubuntu 12.04 (Precise Pangolin). Also dragon.org.uk [[https://blogging.dragon.org.uk/dns-bind9-dhcp-ubuntu-16-04-2/|DNS with bind9 and DHCP on Ubuntu 16.04]].\\
   *[[https://www.digitalocean.com/community/tutorials/how-to-configure-bind-as-a-private-network-dns-server-on-debian-9|How To Configure BIND as a Private Network DNS Server on Debian 9]]\\
   *[[https://computingforgeeks.com/configure-slave-bind-dns-server-on-debian/|Configure BIND Slave DNS Server on Debian 11]]
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   *''sudo cp /etc/bind/named.conf.default-zones /etc/bind/default.named.conf.default-zones''
+====Bind9 Control Nomenclature====
+There are a number of "names" that are used with bind9 dns.
+  * "bind9" is the DNS software is known as isc_bind9, and systemctl in some Linux refers to the service as bind9.service.
+  * "named" is the normal name of the isc-bind9 code that is call to start the application
+  * "rndc" is an application used to control a running bind9 instance, e.g. ''rndc reload'' to reload the configuration
 ====Setting Bind9 to IPv4 Mode====
 ''sudo vim /etc/default/bind9'' or ''sudo vim /etc/default/named'', set following parameter: ''OPTIONS="-u bind -4"''