Unable to configure bind9 on Ubuntu 18.04

[VladLucaci]

[Affected Platforms]:

• Ubuntu 18.04

The steps I go through in order to configure bind9 are as follows:

1. Run the "sudo gedit /etc/bind/named.conf.options" command to edit the file and add the "response-policy { zone "bind-blocked-domains.rpz" ; };" line at the end of the file then save.

2. Run the "sudo gedit /etc/bind/named.conf.default-zone" command to edit the file and add the following lines at the end of the file and save it.

zone "bind-blocked-domains.rpz" IN { type master; file "/etc/bind/blocked-domains.rpz"; };

3. Run the "sudo gedit /etc/bind/blocked-domains.rpz" command to create a new file and edit it and add the following lines:

$TTL 2h ; default TTL @ IN SOA localhost. root.localhost. ( 2 ; serial 3H ; refresh 1H ; retry 1W ; expiry 1H) ; minimum IN NS localhost.use-application-dns.net CNAME . *.use-application-dns.net CNAME .

4. Run the "sudo gedit /etc/resolv.conf" command to edit the file and make sure the "nameserver 127.0.0.1" line is present. (at this point, no matter how many times I reconfigured, the address always ends in 53 instead of .01)

5. In the terminal, run the following command:

nslookup use-application-dns.net Server: 127.0.0.1 Address: 127.0.0.1#53 (regardless if manually change the adress to end in 1 or in 53 and run this command, the terminal simply does not respond in any way)

[Notes]:

• I also tried the following methods in order to troubleshoot the configuration with no success:
  1. Flush DNS cache: sudo systemd-resolve --flush-caches

2. Add this line to the end of the file /etc/dhcp/dhclient.conf (use "sudo gedit /etc/dhcp/dhclient.conf to edit the file):

supersede domain-name-servers 127.0.0.1

Then renew your DHCP lease: sudo dhclient -r

3. Check the DNS server your system is using and make sure it is 127.0.0.1:

sudo systemd-resolve --status

[nhi-nguyen]

not a problem in the addon, and the issue has been resolved.