Hello,

​

my pihole shows the error message DNS Service not running.

For a different service I executed this

sudo apt remove dhcpcd5
sudo apt install bridge-utils
sudo bash -c 'cat << EOT > /etc/network/interfaces
source-directory /etc/network/interfaces.d

auto lo
iface lo inet loopback

iface eth0 inet manual

auto br0
iface br0 inet static
  bridge_ports eth0
  address <address>
  netmask <netmask>
  gateway <gateway>
  dns-nameservers <dns1> <dns2>
EOT'

Im not the best with that network stuff so Im not 100% sure whats happening there but in combination with me playing around on the router with IPv6 everything is messed up.

ip addr:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master br0 state UP group default qlen 1000
    link/ether dc:a6:32:d7:22:e7 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether dc:a6:32:d7:22:e8 brd ff:ff:ff:ff:ff:ff
4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 26:3d:c3:e3:92:f2 brd ff:ff:ff:ff:ff:ff
    inet 192.168.178.32/24 brd 192.168.178.255 scope global br0
       valid_lft forever preferred_lft forever
    inet6 SOMEIPv6 scope global deprecated dynamic mngtmpaddr 
       valid_lft 6594sec preferred_lft 0sec
    inet6 SOMEIPv6 scope global deprecated dynamic mngtmpaddr 
       valid_lft 6594sec preferred_lft 0sec
    inet6 SOMEIPv6 scope link 
       valid_lft forever preferred_lft forever
5: lxcbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 00:16:3e:00:00:00 brd ff:ff:ff:ff:ff:ff
    inet 10.0.3.1/24 brd 10.0.3.255 scope global lxcbr0
       valid_lft forever preferred_lft forever
6: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:63:06:2c:11 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
8: vethpivccu@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master br0 state UP group default qlen 1000
    link/ether fe:ce:9a:3c:b9:6b brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet6 SOMEIPv6 scope link 
       valid_lft forever preferred_lft forever

If it is a port problem

sudo netstat -nltup | grep 'Proto\|:53 \|:5053 \|:5353 \|:5335 \|:8953 \|:67 \|:80 \|:471':

Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      29206/lighttpd      
tcp        0      0 10.0.3.1:53             0.0.0.0:*               LISTEN      902/dnsmasq         
tcp6       0      0 :::80                   :::*                    LISTEN      29206/lighttpd      
udp        0      0 10.0.3.1:53             0.0.0.0:*                           902/dnsmasq         
udp        0      0 0.0.0.0:67              0.0.0.0:*                           902/dnsmasq         
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           435/avahi-daemon: r 
udp6       0      0 :::5353                 :::*                                435/avahi-daemon: r