#!/bin/bash
# Execute these commands first time in order to create required files
# $ dnssec-keygen -K /etc/bind -a RSASHA256 -b 4096 -n ZONE -3 -f KSK $DOMAIN
# $ dnssec-keygen -K /etc/bind -a RSASHA256 -b 2048 -n ZONE $DOMAIN
# $ opendkim-genkey -b 2048 -h rsa-sha256 -r -s dkim -d $DOMAIN -v
DOMAIN=$DOMAIN
IP=$IP
IPV6=$IPV6
DKIM=$(sed -e 's/"/\"/g' /etc/bind/dkim.txt)
if [ $(cat /etc/bind/version) -gt 99 ] || [ ! -e /etc/bind/version ]; then
  echo 1 > /etc/bind/version
fi
rm -f /etc/bind/rev.*
echo -e ";
; BIND data for $DOMAIN
;
\$TTL 3h
@       IN      SOA     ns1.$DOMAIN. admin.$DOMAIN. (
                        $(date +%Y%m%d)$(cat /etc/bind/version) ; SERIAL
                        3h      ; Refresh
                        1h      ; Retry
                        1w      ; Expire
                        1h )    ; Minimum
;
@       IN      NS      ns1.$DOMAIN.

$DOMAIN.                IN      A       $IP
$DOMAIN.                IN      AAAA    $IPV6
$DOMAIN.                IN      NS      ns1
$DOMAIN.                IN      NS      ns2
ns1                     IN      A       $IP
ns1                     IN      AAAA    $IPV6
ns2                     IN      A       $IP
ns2                     IN      AAAA    $IPV6
mail                    IN      A       $IP
mail                    IN      AAAA    $IPV6
pop                     IN      A       $IP
pop                     IN      AAAA    $IPV6
smtp                    IN      A       $IP
smtp                    IN      AAAA    $IPV6
imap                    IN      A       $IP
imap                    IN      AAAA    $IPV6
*                       IN      CNAME   $DOMAIN.
$DOMAIN.        IN      MX      10     mail.$DOMAIN.
$DOMAIN.        IN      TXT     \"v=spf1 a mx -all\"
_dmarc                  IN      TXT     \"v=DMARC1;p=reject;rua=mailto:postmaster@$DOMAIN;pct=80;ruf=mailto:postmaster@$DOMAIN;sp=reject;aspf=s;adkim=s;ri=86400;fo=0;rf=afrf\"
;_acme-challenge         IN      TXT     \"xxx\"
$DKIM

\$INCLUDE K$DOMAIN.+XXX+YYYYY.key
\$INCLUDE K$DOMAIN.+XXX+YYYYY.key"> /etc/bind/$DOMAIN
echo -e ";
; BIND reverse file for $(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')
;
\$TTL    604800
@       IN      SOA     ns1.$DOMAIN. admin.$DOMAIN. (
                                $(date +%Y%m%d)$(cat /etc/bind/version)       ; Serial
                                3h      ; Refresh
                                1h      ; Retry
                                1w      ; Expire
                                1h )    ; Minimum
;
@       IN      NS      ns1.$DOMAIN.
@       IN      NS      ns2.$DOMAIN.

$(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -r 's/^REVERSEDNS=([[:digit:]]+).*/\1/')       IN      PTR     $DOMAIN.
$(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -r 's/^REVERSEDNS=([[:digit:]]+).*/\1/')       IN      PTR     mail.$DOMAIN." > /etc/bind/rev.$(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')
echo -e "\$TTL    604800
; BIND reverse file for $(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')
@       IN      SOA     ns1.$DOMAIN. admin.$DOMAIN. (
                                $(date +%Y%m%d)$(cat /etc/bind/version)       ; Serial
                                3h      ; Refresh
                                1h      ; Retry
                                1w      ; Expire
                                1h )    ; Minimum
;
@       IN      NS      ns1.$DOMAIN.
@       IN      NS      ns2.$DOMAIN.

; IPv6 PTR entries
$(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=\([[:digit:]]\)\+.*/\1/')	IN    PTR    $DOMAIN.
$(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=\([[:digit:]]\)\+.*/\1/')	IN    PTR    mail.$DOMAIN." > /etc/bind/rev.$(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')
echo -e "\$TTL    604800
@       IN      SOA     ns1.$DOMAIN. admin.$DOMAIN. (
                                $(date +%Y%m%d)$(cat /etc/bind/version)       ; Serial
                                3h      ; Refresh
                                1h      ; Retry
                                1w      ; Expire
                                1h )    ; Minimum
;
@       IN      NS      ns1.$DOMAIN.
@       IN      NS      ns2.$DOMAIN.

; IPv6 PTR entries
$(ipv6calc -q -a ::ffff:$IP | sed -e 's/\..*$//')	IN    PTR    $DOMAIN.
$(ipv6calc -q -a ::ffff:$IP | sed -e 's/\..*$//')	IN    PTR    mail.$DOMAIN." > /etc/bind/rev.$(ipv6calc -q -a ::ffff:$IP | sed -e 's/^[[:digit:]]\+\.//' -e 's/\.$//')
echo -e "//
// 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 \"$DOMAIN\" {
     type primary;
     file \"/etc/bind/$DOMAIN.signed\";
     notify explicit;
};

zone \"$(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')\" {
     type master;
     file \"/etc/bind/rev.$(ipcalc -4 -a --reverse-dns $IP | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')\";
};

zone \"$(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')\" {
     type master;
     file \"/etc/bind/rev.$(ipcalc -6 -a --reverse-dns $IPV6 | grep REVERSEDNS | sed -e 's/^REVERSEDNS=[[:digit:]]\+\.//')\";
};

acl \"trusted\" {
        127.0.0.0/8;
};

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 {
        //  0.0.0.0;
        // };

        //========================================================================
        // If BIND logs error messages about the root key being expired,
        // you will need to update your keys.  See https://www.isc.org/bind-keys
        //========================================================================
        //dnssec-enable yes;
        dnssec-validation auto;
        //dnssec-lookaside auto;

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

        // config-bind9.txt
        disable-empty-zone \".\";
//        root-delegation-only;
        require-server-cookie no;
        send-cookie yes;
        check-wildcard no;
        clients-per-query 20;
        max-clients-per-query 30;
        auth-nxdomain yes;
        listen-on { any; };
        listen-on-v6 { any; };
        max-udp-size 512;
        recursion no;
        minimal-responses yes;
        notify no;
        allow-transfer { none; };
        allow-query { any; };
        allow-query-cache { trusted; };
        allow-query-cache-on { trusted; };
        allow-query-on { trusted; };
        allow-recursion { trusted; };
        allow-notify { trusted; };
        allow-update { none; };
        version none;
        check-names master warn;
        check-names slave warn;
        check-names response warn;
        querylog yes;
        hostname \"$DOMAIN\";
        server-id \"$DOMAIN\";
};

logging {
    channel querylog{
        file \"/var/log/querylog\";
        severity info;
        print-category yes;
        print-time yes;
        print-severity yes;
    };
    category queries { querylog; };
};"> /etc/bind/named.conf.options
chown $(id -u bind):$(id -g bind) -R /etc/bind
echo $(echo $(cat /etc/bind/version)"+1" | bc) > /etc/bind/version
cd /etc/bind
dnssec-signzone -A -3 $(head -c 1000 /dev/urandom | sha1sum | cut -b 1-16) -N INCREMENT $DOMAIN
/usr/sbin/named -u bind