====== BIND9 / DNS Server Installation ====== This will configure split DNS. This will allow you to create a local DNS zone "scottworld.net" which will handle all local requests. It will be an extension of scottworld.net which is the registered domain. Requests for scottworld.net hosts (and other traffic) that are not local are forwarded out to the internet. Install bind. apt install bind9 Shut down the service for configuration systemctl stop bind9.service ====== Update bind to use IP 4 addresses only ====== This will prevent a whole bunch of IP6 fails and your log filling up. nano /etc/default/named Add / edit the following lines # # run resolvconf? RESOLVCONF=no # startup options for the server OPTIONS="-u bind -4" ====== Define the zones for the local domain ====== We will now edit named.conf.local and set up the zones we are using for DNS. sudo nano /etc/bind/named.conf.local Add a zones and their location for the local domain and the access rights. Here we define 2 zones, a forward and reverse zone. include "/etc/bind/rndc.key"; zone "scottworld.net" { type master; file "/var/lib/bind/zones/db.scottworld.net"; check-names ignore; allow-update { key rndc-key; }; }; zone "3.10.in-addr.arpa" { type master; file "/var/lib/bind/zones/db.10.3"; check-names ignore; allow-update { key rndc-key; }; }; ====== Set up a Zones Folder ====== Create a zone folder to host the zone files in /var/lib/bind/ mkdir /var/lib/bind/zones ====== Configure the local forward lookup zone ====== nano /var/lib/bind/zones/db.scottworld.net Here we also add to STATIC hosts as A records (contained in the zone file) $ORIGIN . $TTL 604800 ; 1 week scottworld.net IN SOA solaris.scottworld.net. mark.scottworld.net. ( 1 ; serial 604800 ; refresh (1 week) 86400 ; retry (1 day) 2419200 ; expire (4 weeks) 604800 ; minimum (1 week) ) NS solaris.scottworld.net. A 10.3.200.1 $ORIGIN scottworld.net. amazon-5f60112a9 A 10.3.50.13 amazon-c01e642c8 A 10.3.50.12 asteriod A 10.3.101.2 BackCam A 10.3.50.31 Chromecast A 10.3.50.14 comet A 10.3.200.3 cyd A 10.3.50.24 ddhomerun A 10.3.50.1 Dining-main A 10.3.50.5 Dining-uplighter1 A 10.3.50.17 Dining-uplighter2 A 10.3.50.18 DoorBell A 10.3.50.32 envoy A 10.3.50.2 FrontCam A 10.3.50.30 gateway A 10.3.1.1 HotWaterRelay A 10.3.50.33 ipPhone A 10.3.50.40 Landing-main A 10.3.50.10 Lounge-colin A 10.3.50.21 Lounge-floor A 10.3.50.16 Lounge-larry A 10.3.50.15 Lounge-main A 10.3.50.4 mame A 10.3.50.20 mars A 10.3.200.2 mimas A 10.3.101.3 MiniR2 A 10.3.50.23 mqtt CNAME mars patio A 10.3.50.6 porch A 10.3.50.7 PowerCord A 10.3.50.19 printer A 10.3.101.100 roku A 10.3.50.9 saturn A 10.3.101.1 scottcloud CNAME solaris scotthome CNAME solaris scottscreen A 10.3.50.3 solaris A 10.3.200.1 WAPLoft A 10.3.1.2 WAPLounge A 10.3.1.3 wiki CNAME scottworrs.cluster020.hosting.ovh.net. wikimin CNAME solaris www CNAME scottworrs.cluster020.hosting.ovh.net. yamaha A 10.3.50.8 ====== Configure the local reverse lookup zone ====== nano /var/lib/bind/zones/db.10.3 $ORIGIN . $TTL 604800 ; 1 week 3.10.in-addr.arpa IN SOA solaris.scottworld.net. mark\@scottworld.net. ( 1 ; serial 604800 ; refresh (1 week) 86400 ; retry (1 day) 2419200 ; expire (4 weeks) 604800 ; minimum (1 week) ) NS solaris.scottworld.net. $ORIGIN 1.3.10.in-addr.arpa. 1 PTR gateway.scottworld.net. 2 PTR WAPLoft.scottworld.net. 3 PTR WAPLounge.scottworld.net. $ORIGIN 50.3.10.in-addr.arpa. 1 PTR ddhomerun.scottworld.net. 10 PTR Landing-main.scottworld.net. 12 PTR amazon-c01e642c8.scottworld.net. 13 PTR amazon-5f60112a9.scottworld.net. 14 PTR Chromecast.scottworld.net. 15 PTR Lounge-larry.scottworld.net. 16 PTR Lounge-floor.scottworld.net. 17 PTR Dining-uplighter1.scottworld.net. 18 PTR Dining-uplighter2.scottworld.net. 19 PTR PowerCord1.scottworld.net. 2 PTR envoy.scottworld.net. 20 PTR mame.scottworld.net. 21 PTR Lounge-colin.scottworld.net. 23 PTR MiniR2.scottworld.net. 24 PTR cyd.scottworld.net. 3 PTR scottscreen.scottworld.net. 30 PTR FrontCam.scottworld.net. 31 PTR BackCam.scottworld.net. 32 PTR DoorBell.scottworld.net. 33 PTR HotWaterRelay.scottworld.net. 4 PTR Lounge-main.scottworld.net. 40 PTR ipPhone.scottworld.net. 5 PTR Dining-main.scottworld.net. 6 PTR patio.scottworld.net. 7 PTR porch.scottworld.net. 8 PTR yamaha.scottworld.net. 9 PTR roku.scottworld.net. $ORIGIN 100.3.10.in-addr.arpa. $ORIGIN 101.3.10.in-addr.arpa. 1 PTR saturn.scottworld.net. 100 PTR printer.scottworld.net. 2 PTR asteroid.scottworld.net. 3 PTR mimas.scottworld.net. $ORIGIN 200.3.10.in-addr.arpa. 1 PTR solaris.scottworld.net. 2 PTR mars.scottworld.net. 3 PTR comet.scottworld.net. ; also list other computers ====== Allow the openVPN network to used locally cached DNS entries ====== nano named.conf.options add these lines to the options file. allow-query-cache { localnets; 10.3.0.0/16; }; allow-recursion { localnets; 10.3.0.0/16; }; ====== Set folder permissions and test ====== Set the permissions on the folder / zone files so BIND can write to them. chown bind:bind /var/lib/bind/zones -R chmod 770 /var/lib/bind/zones chmod 660 /var/lib/bind/zones/* Restart BIND systemctl start bind9.service Test that the dns lookups works with the local server: dig @10.3.200.1 google.com The response should be: root@solaris:~# dig google.com ; <<>> DiG 9.8.1-P1 <<>> google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36080 ;; flags: qr rd ra; QUERY: 1, ANSWER: 11, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;google.com. IN A ;; ANSWER SECTION: google.com. 32 IN A 173.194.34.69 google.com. 32 IN A 173.194.34.65 google.com. 32 IN A 173.194.34.71 google.com. 32 IN A 173.194.34.70 google.com. 32 IN A 173.194.34.73 google.com. 32 IN A 173.194.34.78 google.com. 32 IN A 173.194.34.66 google.com. 32 IN A 173.194.34.68 google.com. 32 IN A 173.194.34.67 google.com. 32 IN A 173.194.34.64 google.com. 32 IN A 173.194.34.72 ;; Query time: 1412 msec ;; SERVER: 192.168.3.1#53(192.168.3.1) ;; WHEN: Mon Apr 30 10:15:47 2012 ;; MSG SIZE rcvd: 204 Test that the reverse lookup works: host 10.3.200.1 Response: root@solaris:/var/lib/bind/zones# host 10.3.200.1 1.200.3.10.in-addr.arpa domain name pointer solaris. 1.200.3.10.in-addr.arpa domain name pointer solaris.local. REMEMBER '''Do not forget to update the serial every time you make any changes to a zone file.''' To make a change to DNS. rndc freeze nano /var/lib/bind/zones/ Make sure you update the serial number rndc thaw ====== Update Netplan to use yourself as DNS ====== nano /etc/netplan/00-solaris.yaml Change the nameserver to yourself 10.3.200.1 netplan apply