Ubuntu 22.04
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BIND : DNS over HTTPS サーバーの設定
2022/04/26
 
BIND での DNS over HTTPS サーバーの設定です。
[1]
[2] BIND の設定です。
root@dlp:~#
openssl dhparam -out /etc/bind/dhparam.pem 3072

root@dlp:~#
cp /etc/letsencrypt/live/dlp.srv.world/{fullchain.pem,privkey.pem} /etc/bind/

root@dlp:~#
chown bind:bind /etc/bind/{fullchain.pem,privkey.pem,dhparam.pem}
root@dlp:~#
vi /etc/bind/named.conf.options
# 証明書の設定を追記
tls local-tls {
        key-file "/etc/bind/privkey.pem";
        cert-file "/etc/bind/fullchain.pem";
        dhparam-file "/etc/bind/dhparam.pem";
};

http local {
    endpoints { "/dns-query"; };
};

options {
.....
.....
        dnssec-validation auto;

        # 以下のように追記/変更
        listen-on tls local-tls http local { any; };
        listen-on-v6 tls local-tls http local { any; };
};

root@dlp:~#
systemctl restart named

[3] HTTPS で名前解決ができるかどうかの動作確認を行います。
root@dlp:~#
dig +https @127.0.0.1 dlp.srv.world.


; <<>> DiG 9.18.1-1ubuntu1.2-Ubuntu <<>> +https @127.0.0.1 dlp.srv.world.
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14608
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; COOKIE: ddf21629cb7830f5010000006380590ac0af316455f00b68 (good)
;; QUESTION SECTION:
;dlp.srv.world.                 IN      A

;; ANSWER SECTION:
dlp.srv.world.          86400   IN      A       10.0.0.30

;; Query time: 0 msec
;; SERVER: 127.0.0.1#443(127.0.0.1) (HTTPS)
;; WHEN: Fri Nov 25 14:56:26 JST 2022
;; MSG SIZE  rcvd: 86
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