ISC-DHCP

Installation §

vmls4:

sudo apt update
sudo apt -y install isc-dhcp-server

Konfiguration DHCP §

vmls4:

/etc/dhcp/dhcpd.conf:

...
option domain-name "smartlearn.lan.";
option domain-name-servers ns.smartlearn.dmz;
authoritative;
subnet 192.168.210.0 netmask 255.255.255.0 {
    range 192.168.210.100 192.168.210.110;
    option domain-name-servers 192.168.220.13;
    option domain-name "smartlearn.lan.";
    option domain-search "smartlearn.lan", "smartlearn.dmz";
    option subnet-mask 255.255.255.0;
    option routers 192.168.210.1;
    default-lease-time 120;
    max-lease-time 300;
}

host vmls5 {
    hardware ethernet 00:50:56:00:24:33;
    fixed-address 192.168.210.65;
    option host-name "vmls5";
}
...

Neustart der Dienste §

vmls4:

sudo systemctl restart isc-dhcp-server

Konfiguration DDNS §

Generation vom rndc key §

vmls3:

sudo rndc-confgen -a -b 512
sudo cp /etc/bind/rndc.key ~/rndc.key # Vorbereitung für scp
sudo chown vmadmin:vmadmin ~/rndc.key # Vorbereitung für scp

Generiert eine Datei /etc/bind/rndc.key.

Anpassung DNS Update §

vmls3: /etc/bind/named.conf.local:

...
include "/etc/bind/rndc.key";
...
zone "smartlearn.lan" IN {
	...
    allow-update {
        key "rndc-key";
    };
};
zone "210.168.192.in-addr.arpa" IN {
	...
    allow-update {
        key "rndc-key";
    };
};
...

Anpassung DNS Zone §

vmls3: /etc/bind/db.lan.smartlearn:

...
;vmwp1  IN      A       192.168.210.11
...
;vmlp1  IN      A       192.168.210.31
...
;vmls5  IN      A       192.168.210.65
...

Anpassung DNS §

Verschieben der DNS Zonen §

vmls3:

sudo cp /etc/bind/db.lan.smartlearn /etc/bind/db.lan.smartlearn.bak
sudo cp /etc/bind/db.168.210 /etc/bind/db.168.210.bak
sudo mv /etc/bind/db.lan.smartlearn /var/cache/bind/
sudo mv /etc/bind/db.168.210 /var/cache/bind/
sudo chown root:bind /var/cache/bind/db.lan.smartlearn
sudo chown root:bind /var/cache/bind/db.168.210

Zonenpfade anpassen §

vmls3: /etc/bind/named.conf.local:

...
zone "smartlearn.lan" IN {
	...
    file "/var/cache/bind/db.lan.smartlearn";
    ...
};
zone "210.168.192.in-addr.arpa" IN {
	...
    file "/var/cache/bind/db.168.210";
    ...
};
...

Übertragung rndc key §

vmls4:

sudo scp vmadmin@vmls3:~/rndc.key /etc/dhcp/ddns-keys/rndc.key

Anpassung DHCP §

vmls4: /etc/dhcp/dhcpd.conf:

...
ddns-update-style standard;
ddns-updates on;
ignore client-updates;
update-static-leases on;
...
include "/etc/dhcp/ddns-keys/rndc.key";
...
zone smartlearn.lan. {
    primary vmls3.smartlearn.dmz.;
    key rndc-key;
}

zone 210.168.192.in-addr.arpa. IN {
    primary vmls3.smartlearn.dmz.;
    key rndc-key;
}
...

Neustart der Dienste §

vmls3:

sudo systemctl restart apparmor
sudo systemctl restart named

vmls4:

sudo systemctl restart isc-dhcp-server

Test §

sudo apt update
sudo apt -y install dhcpcd5

sudo dhcpcd -T eth0
sudo journalctl -u isc-dhcp-server -f -n 100 # Server
cat /var/lib/dhcp/dhcpd.leases # Server
cat /var/lib/dhcp/dhclient.leases # Client