Bind9 kompakt

systemd-resolved abschalten

• systemctl disable systemd-resolved
• systemctl stop systemd-resolved

Installation

• apt-get install bind9

/etc/resolv.conf setzen

• rm /etc/resolv.conf
• echo nameserver 127.0.0.1 > /etc/resolv.conf

Test

• host -t a www.xinux.de

forward zone

lokale Konfiguration

• zu /etc/bind/named.conf.local hinzufügen

zone "vulkan.int" {
type master;
file "vulkan.int";
};

Erklärung

• zone - Name der Zone
• type - Type der Zone - master - slave
• file - Name der Datei wo die Informationen zu finden sind

Zonendatei

• vi /var/cache/bind/vulkan.int

$TTL 300
vulkan.int.   IN SOA  unaris.vulkan.int. technik.xinux.de. (
                        2011090204  ;
                        14400   ;
                        3600    ;
                        3600000 ;
                        86400   ;
                    )
        IN NS      unaris.vulkan.int.
unaris      IN A       192.168.25.4

Erklärung

• $TTL 300 - 300 Sekunden wird der Namenseintrag im lokalen Cache gehalten.
• vulkan.int - Name der Domain
• SOA - Start of Authority - Wer ist Zuständig
• unaris.vulkan.int. - Primärer Nameserver
• technik.xinux.de. - Mailadresse - @ wird durch . ersetzt
• 2011090204 - Seriennummer, Datum + Version
• 14400 - Refresh Zeit
• 3600 - Wiederholungszeit beim Nichterreichen.
• 3600000 - Maximale Gültikeit beim Nichterreichen.
• 86400 - Negativer Cache
• IN - Internet Name
• NS - Namerver Record
• A - A Record

restart bind

• systemctl restart bind9

test

• host -t a unaris.vulkan.int 127.0.0.1

Using domain server:
Name: 127.0.0.1
Addrallow-transfer { 192.168.249.121 };ess: 127.0.0.1#53
Aliases: 

unaris.vulkan.int has address 192.168.25.4

reverse zone

config file

add to /etc/bind/named.conf.local

zone "25.168.192.in-addr.arpa" {
          type master;
          file "25.168.192.in-addr.arpa";
};

zone file

• vi /var/cache/bind/25.168.192.in-addr.arpa

$TTL 300
@   IN SOA  unaris.vulkan.int. technik.xinux.de. (
    2011090204 14400 3600 3600000 86400)
IN NS   unaris.vulkan.int.
4   IN PTR  unaris.vulkan.int.

restart bind

• systemctl restart bind9

tests

• host -t ptr 192.168.25.4 127.0.0.1

  Using domain server: Name: 127.0.0.1 Address: 127.0.0.1#53 Aliases:

  4.25.168.192.in-addr.arpa domain name pointer unaris.vulkan.int.

Eintragen der Forward Nameserver

• cat /etc/bind/named.conf.options

options { 
directory "/var/cache/bind";
forwarders { 
        10.80.0.2;
        10.80.0.3;
    };
...
    ...
};

Generate

$TTL 300
@   IN SOA  dozent.it150.int. technik.xinux.de. (
                     2022092001 14400 3600 3600000 86400
                                  )
                  IN NS      dozent.it150.int.
dozent.it150         IN A       192.168.2.200
; DHCP - Range 192.168.2.0/24
$GENERATE 101-112 firewall.it$ A 192.168.2.$
$GENERATE 101-112 server.it$ A 10.0.$.21
$GENERATE 101-112 desktop.it$ A 192.168.$.11

$GENERATE 150-150 firewall.it$ A 192.168.2.$
$GENERATE 150-150 server.it$ A 10.0.$.21
$GENERATE 150-150 desktop.it$ A 192.168.$.11

Ergebnis

desktop.it101.int.  300 IN  A   192.168.101.11
firewall.it101.int. 300 IN  A   192.168.2.101
server.it101.int.   300 IN  A   10.0.101.21
desktop.it102.int.  300 IN  A   192.168.102.11
firewall.it102.int. 300 IN  A   192.168.2.102
server.it102.int.   300 IN  A   10.0.102.21
desktop.it103.int.  300 IN  A   192.168.103.11
firewall.it103.int. 300 IN  A   192.168.2.103
server.it103.int.   300 IN  A   10.0.103.21
desktop.it104.int.  300 IN  A   192.168.104.11
firewall.it104.int. 300 IN  A   192.168.2.104
server.it104.int.   300 IN  A   10.0.104.21
desktop.it105.int.  300 IN  A   192.168.105.11
firewall.it105.int. 300 IN  A   192.168.2.105
server.it105.int.   300 IN  A   10.0.105.21
desktop.it106.int.  300 IN  A   192.168.106.11
firewall.it106.int. 300 IN  A   192.168.2.106
server.it106.int.   300 IN  A   10.0.106.21
desktop.it107.int.  300 IN  A   192.168.107.11
firewall.it107.int. 300 IN  A   192.168.2.107
server.it107.int.   300 IN  A   10.0.107.21
desktop.it108.int.  300 IN  A   192.168.108.11
...
...

Links

+https://wolfgang.dautermann.at/vortraege/CLT2010-Bind9.pdf