https://plnx.nl/wiki/index.php?action=history&feed=atom&title=DNS-DHCP_configuration 2026-05-03T12:50:45Z Revision history for this page on the wiki MediaWiki 1.42.6 https://plnx.nl/wiki/index.php?title=DNS-DHCP_configuration&diff=8&oldid=prev 2025-05-17T07:39:31Z

<p>Created page with &quot;=IPv4= Configuration file for &quot;dhcpd -4 -cf dhcpd.conf.ipv4 eth0&quot; ==dhcpd.conf.ipv4== &lt;pre&gt; # dhcpd.conf.ipv4 ############################## # default options: authoritative; log-facility local7; ddns-update-style interim; option domain-name &quot;local.lan&quot;; lease-file-name &quot;/var/run/dhcpd/dhcpd.leases.ipv4&quot;; default-lease-time 7200; max-lease-time 28800; update-conflict-detection false; ############################## # dynamic dns updates include &quot;/etc/dhcp-dns.key&quot;;...&quot;</p> <p><b>New page</b></p><div>=IPv4=<br /> Configuration file for &quot;dhcpd -4 -cf dhcpd.conf.ipv4 eth0&quot;<br /> ==dhcpd.conf.ipv4==<br /> &lt;pre&gt;<br /> # dhcpd.conf.ipv4<br /> <br /> ##############################<br /> # default options:<br /> authoritative;<br /> log-facility local7;<br /> <br /> ddns-update-style interim;<br /> option domain-name &quot;local.lan&quot;;<br /> <br /> lease-file-name &quot;/var/run/dhcpd/dhcpd.leases.ipv4&quot;;<br /> default-lease-time 7200;<br /> max-lease-time 28800;<br /> <br /> update-conflict-detection false;<br /> <br /> ##############################<br /> # dynamic dns updates<br /> <br /> include &quot;/etc/dhcp-dns.key&quot;;<br /> <br /> zone local.lan. {<br /> primary 127.0.0.1;<br /> key updatekey;<br /> }<br /> <br /> zone 0.0.10.in-addr.arpa. {<br /> primary 127.0.0.1;<br /> key updatekey;<br /> }<br /> <br /> ##############################<br /> # subnet and host definitions<br /> <br /> subnet 10.0.0.0 netmask 255.255.255.0 {<br /> range 10.0.0.128 10.0.0.191;<br /> option routers 10.0.0.1;<br /> option domain-name-servers 10.0.0.1;<br /> option ntp-servers 10.0.0.1;<br /> option broadcast-address 10.0.0.255;<br /> }<br /> <br /> group {<br /> host printer {<br /> hardware ethernet 00:de:ad:be:ef:01;<br /> fixed-address 10.0.0.10;<br /> }<br /> <br /> host fridge {<br /> hardware ethernet 00:de:ad:be:ef:02;<br /> fixed-address 10.0.0.11;<br /> }<br /> update-static-leases on;<br /> }<br /> &lt;/pre&gt;<br /> <br /> ==dhcp-dns.conf==<br /> And the dhcp-dns.conf file is generated by the following command:<br /> &lt;pre&gt;<br /> dnssec-keygen -a HMAC-MD5 -b 128 -n USER DHCP_UPDATER<br /> &lt;/pre&gt;<br /> It creates a file called Kdhcp_updater.+???+?????.key.<br /> Get your hash from the key file and paste it in dhcp-dns-conf, which should look like this:<br /> &lt;pre&gt;<br /> key updatekey {<br /> algorithm hmac-md5;<br /> secret &quot;abcdefghijklmnopqrstuv==&quot;;<br /> };<br /> &lt;/pre&gt;<br /> <br /> ==named.conf==<br /> Then all we need is named.conf:<br /> &lt;pre&gt;<br /> options {<br /> pid-file &quot;/var/run/named/named.pid&quot;;<br /> directory &quot;/var/named&quot;;<br /> listen-on port 53 {127.0.0.1;10.0.0.1;};<br /> allow-query {127.0.0.0/8;10.0.0.0/24;};<br /> };<br /> <br /> ////////////////////////////////////////////<br /> // include key to receive updates from dhcpd<br /> include &quot;/etc/dhcp-dns.key&quot;;<br /> <br /> <br /> zone &quot;.&quot; IN {<br /> type hint;<br /> file &quot;named.root&quot;;<br /> };<br /> <br /> zone &quot;local.lan&quot; IN {<br /> type master;<br /> file &quot;local.lan.zone&quot;;<br /> allow-update { key updatekey; };<br /> };<br /> <br /> zone &quot;0.0.10.in-addr.arpa&quot; IN {<br /> type master;<br /> file &quot;0.0.10.in-addr.arpa.rev&quot;;<br /> allow-update { key updatekey; };<br /> };<br /> &lt;/pre&gt;<br /> =IPv6=<br /> Configuration file for &quot;dhcpd -6 -cf dhcpd.conf.ipv6 eth0&quot;<br /> ==dhcpd.conf.ipv6==<br /> &lt;pre&gt;<br /> # dhcpd.conf.ipv6<br /> <br /> ##############################<br /> # default options:<br /> authoritative;<br /> log-facility local7;<br /> <br /> ddns-update-style interim;<br /> #ddns-updates on;<br /> ddns-domainname &quot;local.lan&quot;;<br /> option domain-name &quot;local.lan&quot;;<br /> option domain-search &quot;local.lan&quot;;<br /> option dhcp6.name-servers 2001:dead:beef::;<br /> option dhcp6.sntp-servers 2001:dead:beef::;<br /> dhcpv6-lease-file-name &quot;/var/run/dhcpd/dhcpd.leases.ipv6&quot;;<br /> default-lease-time 7200;<br /> max-lease-time 28800;<br /> <br /> update-conflict-detection false;<br /> <br /> ##############################<br /> # dynamic dns updates<br /> <br /> include &quot;/etc/dhcp-dns.key&quot;;<br /> <br /> zone local.lan. {<br /> primary 127.0.0.1;<br /> key updatekey;<br /> }<br /> <br /> zone f.e.e.b.d.a.e.d.1.0.0.2.ip6.arpa. {<br /> primary 127.0.0.1;<br /> key updatekey;<br /> }<br /> <br /> subnet6 2001:dead:beef::/64 {<br /> range6 2001:dead:beef::80 2001:dead:beef::ff;<br /> }<br /> &lt;/pre&gt;<br /> <br /> ==named.conf==<br /> Stuff that needs to be added to named.conf for IPv6:<br /> &lt;pre&gt;<br /> options {<br /> listen-on-v6 port 53 {2001:dead:beef::;::1;};<br /> query-source-v6 *;<br /> allow-query {2001:dead:beef::/48;::1;};<br /> };<br /> <br /> zone &quot;f.e.e.b.d.a.e.d.1.0.0.2.ip6.arpa&quot; in {<br /> type master;<br /> file &quot;2001.dead.beef.ipv6.rev&quot;;<br /> // notify yes;<br /> allow-update { key updatekey; };<br /> allow-transfer { none; };<br /> };<br /> &lt;/pre&gt;</div>

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