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--- linux:tcpip:dns [12/01/2020 23:41] – [dns] mate
+++ linux:tcpip:dns [08/07/2025 01:58] (actual) – [configuració DNS] mate
@@ Línia 6: / Línia 6: @@
   * [[tcpip:dns:dnsmasq]]
   * [[tcpip:dns:bind9]]
+  * [[linux:dns:127]]
+  * [[https://www.dns0.eu/]]
+  * [[https://one.one.one.one/]]
+== direct
+  * esbrinar qui gestiona les dades de xarxa (netplan)
+  * aplicar els canvis (networkmanager en desktops)
+=== DNS populars
+  * Cloudflare DNS (1.1.1.1, 1.0.0.1)
+  * OpenDNS (208.67.222.222, 208.67.220.220)
+  * Google Public DNS (8.8.8.8, 8.8.4.4)
+== configuració DNS
+  * interficie de xarxa:<code bash>ip a
+ifconfig -a</code>
+=== search
+Search domain means the domain that will be automatically appended when you only use the hostname for a particular host or computer. This is basically used in a local network.
+<code properties /etc/network/interfaces>dns-search xyz.com ##If you put this into /etc/network/interfaces<code>
+<code properties>search xyz.com ##If you put this into /etc/resolvconf/resolv.conf.d/base|head|tail</code>
+<code bash>host test
+test.xyz.com has address 192.168.1.5</code>
+<code bash>nslookup test
+Server:     192.168.1.11
+Address:    192.168.1.11#53
+Name:   test.xyz.com
+Address: 192.168.1.5</code>
+/via: [[https://askubuntu.com/questions/584054/how-do-i-configure-the-search-domain-correctly]]
+=== resolv.conf
+  * ''/etc/resolv.conf'' es symlink de fichero generado dinámicamente
+  * ''/etc/resolvconf/resolv.conf.d/head'' añade al principio de ''/etc/resolv.conf''
+  * se gestiona a través de **systemd-resolved** -> **/etc/systemd/resolved.conf**
+  * /etc/systemctl/resolved.conf
+  * /etc/resolv.conf
+    * no recomanat, sobreescrit per NetworkManager
+    * <code>nameserver 8.8.8.8
+nameserver 8.8.4.4</code>
+  * /etc/hosts: <code>
+.47.249.138 wiki.fidmag.org
+</code>
+  * <code bash>resolvectl status</code>
+  * llistat DNS: <code bash>resolvectl --list</code>
+  * actualitzar canvis pendents: <code bash>resolvectl --enable-updates</code>
+  * interficie responent: <code bash>resolvectl -i</code>
+  * update files: <code bash>resolvectl -u</code>
+=== netplan (servers)
+  * identificar el netplan fet servir:<code bash>cat /etc/netplan/01-network-manager-all.yaml</code>
+  * <code yaml NetworkManager>
+# Let NetworkManager manage all devices on this system
+network:
+  version: 2
+  renderer: NetworkManager
+</code>
+  * <code yaml DHCP>network:
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: true
+      nameservers:
+        addresses: [8.8.8.8, 8.8.4.4]</code>
+  * <code yaml IP-fija>network:
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: false
+      addresses: [192.168.1.10/24]
+      gateway4: 192.168.1.1
+      nameservers:
+        addresses:[208.67.222.222, 208.67.220.220]</code>
+  * aplicar: <code bash>sudo netplan apply
+sudo netplan generate # si problemas y repetir apply
+</code>
+=== NetworkManager
+  * Interfície gràfica
+  * després d'aplicar canvis, reiniciar o:<code bash>sudo systemctl restart NetworkManager</code>
+== nmcli
+  * <code bash>nmcli</code>
+  * <code bash>nmcli connection show</code>
+  * <code bash>nmcli device show eno1</code>
+== comandos (OLD)
+  * NO: <code bash>systemctl status systemd-resolved.service</code>
+  * clear DNS debian: <code bash>sudo systemd-resolve --flush-caches</code>
+  * full config?: <code bash>systemd-analyze cat-config systemd/resolved.conf</code>
-== comandos
-  * clear DNS debian: ''sudo systemd-resolve --flush-caches''