Fitpc2i/bind9

インストール

$ sudo apt-get install bind9

設定

/etc/bind ディレクトリに移動。

$ cd /etc/bind
$ ls -l
total 52
-rw-r--r-- 1 root root 3954 Jan 16  2018 bind.keys
-rw-r--r-- 1 root root  237 Jan 16  2018 db.0
-rw-r--r-- 1 root root  271 Jan 16  2018 db.127
-rw-r--r-- 1 root root  237 Jan 16  2018 db.255
-rw-r--r-- 1 root root  353 Jan 16  2018 db.empty
-rw-r--r-- 1 root root  270 Jan 16  2018 db.local
-rw-r--r-- 1 root root 3171 Jan 16  2018 db.root
-rw-r--r-- 1 root bind  463 Jan 16  2018 named.conf
-rw-r--r-- 1 root bind  490 Jan 16  2018 named.conf.default-zones
-rw-r--r-- 1 root bind  165 Jan 16  2018 named.conf.local
-rw-r--r-- 1 root bind  890 Aug 31 02:36 named.conf.options
-rw-r----- 1 bind bind   77 Aug 31 02:36 rndc.key
-rw-r--r-- 1 root root 1317 Jan 16  2018 zones.rfc1918

/etc/bind/named.conf.options を編集．

options {
        directory "/var/cache/bind";

        // If there is a firewall between you and nameservers you want
        // to talk to, you may need to fix the firewall to allow multiple
        // ports to talk.  See http://www.kb.cert.org/vuls/id/800113

        // If your ISP provided one or more IP addresses for stable
        // nameservers, you probably want to use them as forwarders.
        // Uncomment the following block, and insert the addresses replacing
        // the all-0's placeholder.

        forwarders {
                192.168.0.1;
        };

        auth-nxdomain no;    # conform to RFC1035
        listen-on-v6 { any; };
};

ただし，192.168.0.1はブロードバンドルータ．

/etc/bind/named.conf.local を編集．

//
// Do any local configuration here
//

// Consider adding the 1918 zones here, if they are not used in your
// organization
//include "/etc/bind/zones.rfc1918";

zone "fukudat.com" {
        type master;
        file "/etc/bind/db.fukudat.com";
        allow-update {
                192.168.0.0/24;
                127.0.0.1;
        };
};

zone "0.168.192.in-addr.arpa" {
        type master;
        file "/etc/bind/db.0.168.192";
        allow-update {
                192.168.0.0/24;
                127.0.0.1;
        };
};

zone file "/etc/bind/db.fukudat.com" を以下のように作る。

$ORIGIN fukudat.com.
$TTL	86400	; 1 day
@	IN SOA	ns.fukudat.com. root.fukudat.com. (
				2018000002	; Serial
				10800		; Refresh
				1800		; Retry
				4320000		; Expire
				86400		; Negative Cache TTL
				)
		NS	ns.fukudat.com.
		MX	0 mail.fukudat.com.
$TTL 86400
router		A	192.168.0.1
ns		A	192.168.0.11
fitpc2i		A	192.168.0.11
www  		A	xxx.xxx.xxx.xxx

zone file "db.0.168.192" を以下のように作る。

$TTL 86400      ; 1 day
@ IN SOA  ns.fukudat.com. root.fukudat.com. (
	2018000001 ; serial
	10800      ; refresh (3 hours)
	1800       ; retry (30 minutes)
	4320000    ; expire (7 weeks 1 day)
	86400      ; minimum (1 day)
	)
	IN NS	ns.fukudat.com.
1	IN PTR	router.fukudat.com.
11	IN PTR	fitpc2i.fukudat.com.

/etc/bind/named.conf.xxx を編集．(xxxはVPNでつながっているプライベートドメイン）

zone "xxx.com" {
        type forward;
        forwarders { 9.0.4.1; 9.0.5.1; };
};

zone "9.in-addr.arpa" {
        type forward;
        forwarders { 9.0.4.1; 9.0.5.1; };
};

VPNのネームサーバー(上記では9.0.4.1, 9.0.5.1)へのルーティングがあることを確認．なければ永続的な静的ルーティングを参照して作成．

最後にサービスをリスタート．

# /etc/init.d/bind9 restart