Liens
Installation
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sudo pacman dnsmasq
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| /etc/dnsmasq.conf
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# ip du serveur
listen-address=::1, 127.0.0.1, 192.168.0.x
# définit la route par défaut si ce n'est pas celle du serveur dnsmasq
dhcp-option=option:router,192.168.0.y
# Associer un domaine à une adresse IP
address=/mon-domaine.fr/192.168.0.10
# ignore /etc/resolv.conf if there is only localhost
no-resolv
# ignore /etc/hosts if there is only localhost
no-hosts
# Upstream DNS server addresses (serveur DNS de la box)
server=192.168.0.x
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| /etc/resolv.conf
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nameserver ::1
nameserver 127.0.0.1
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| /etc/hosts
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#<ip-address> <hostname.domain.org> <hostname>
127.0.0.1 localhost
::1 localhost
192.168.0.x mabox
192.168.0.y site1.domaine.net site2.domaine.net
192.168.0.z site3 site4
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Après une modification, il faut redémarrer le service dnsmasq |
NetworkManager
Restart of NetworkManager overwrite the /etc/resolv.conf file.
| /etc/NetworkManager/NetworkManager.conf
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[main]
# add the following line to avoid NetworkManager to change the resolv.conf file
dns=none
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DHCPCD
| /etc/dhcpcd.conf
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# dhcpcd, unfortunately, tends to overwrite /etc/resolv.conf by default,
# so if you use DHCP it is a good idea to protect /etc/resolv.conf.
nohook resolv.conf
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| /etc/dnsmasq.conf
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interface=eth0
bind-interfaces
# allouer dynamique les ip 192.168.0.50 à 192.168.0.150
dhcp-range=192.168.0.50,192.168.0.150,12h
# pas d'allocations dynamique, seul les allocations statiques sont autorisées
dhcp-range=192.168.0.0,static
# Baux DHCP statiques
# donne un nom et une ip à l'adresse MAC correspondante
dhcp-host=xx:xx:xx:xx:xx:xx,Nom,192.168.x.x,infinite
# donne une ip à la machine dont le nom correspond
dhcp-host=Nom,192.168.x.x,infinite
# si unique serveur DHCP
dhcp-authoritative
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Afficher les baux dhcp en cours
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cat /var/lib/misc/dnsmasq.leases
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Mettre fin à un bail
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systemctl stop dnsmasq
# supprimer la ligne correspondant au bail
nano /var/lib/misc/dnsmasq.leases
systemctl start dnsmasq
# restart the client to get a new ip adress
sc-restart dhcpcd@eth0
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| /etc/dnsmasq.conf
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interface=eth0
# ajouter l'interface tun
interface=tun0
# ajouter l'ip du serveur sur le réseau VPN
listen-address=127.0.0.1, 10.8.0.1
bind-interfaces
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failed to create listening socket for 10.8.0.1: Cannot assign requested address
Dnsmasq démarre avant qu'OpenVPN n'ai eu le temp d'enregistrer l'ip 10.8.0.1
Étendre la configuration du service dnsmasq sans écraser la configuration par défaut: /usr/lib/systemd/system/dnsmasq.service
| /etc/systemd/system/dnsmasq.service.d/openvpn.conf
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[Unit]
After=openvpn@server.service
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Firewall
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# allow incoming communication on port 53 with protocol tcp and udp
sudo ufw allow 53 comment 'DNS tcp/udp port 53'
sudo ufw allow 67,68/udp comment 'DHCP udp ports 67,68'
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log
/var/log/messages.log
| /etc/dnsmasq.conf
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# For debugging purposes, log each DNS query as it passes through dnsmasq.
log-queries
# Log lots of extra information about DHCP transactions.
log-dhcp
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Erreurs
Temporary failure in name resolution
cron reboot
| crontab
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# restart dnsmasq 60 seconds after reboot
@reboot sleep 60 && systemctl restart dnsmasq
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Dnsmasq fails to respond on network devices that weren't up when its service started, thus not binding as expected.
Fix: delay startup until after the network is online.
| /lib/systemd/system/dnsmasq.service
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[Unit]
#Requires=network.target
#After=network.target
Requires=network-online.target
After=network-online.target
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failed to create listening socket for port 53: Address already in use
Un autre programme utilise déjà le port 53.
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sudo netstat -peanut | grep :53
# tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 102 16584 2147/systemd-resolv
# udp 0 0 127.0.0.53:53 0.0.0.0:* 102 16583 2147/systemd-resolv
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sc-stop systemd-resolved
sc-disable systemd-resolved
# supprimer le lien symbolique /etc/resolv.conf
ls -lh /etc/resolv.conf
# /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf
sudo rm /etc/resolv.conf
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| /etc/resolv.conf
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nameserver 127.0.0.1
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Modifier resolved.conf
| /etc/systemd/resolved.conf
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[Resolve]
DNS=127.0.0.1
DNSStubListener=no
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| /etc/resolv.conf
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nameserver 127.0.0.1
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sc-restart systemd-resolved
sc-start dnsmasq
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Android fait des requêtes DNS IPv6 et n'utilise donc pas DNSmasq.
Utiliser une application de changement d'adresse DNS.
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Il semble que désactiver les IPv6 sur le routeur ait résolu le problème. |
