In order to set up an Active Directory / Domain Controller on the cloud assigning the IP manually and removing IPv6 prevents any future issue.
Start with a fresh virtual machine and give it a name:
sudo hostnamectl set-hostname ad0
Configure the interface using netplan:
sudo systemctl enable systemd-networkd sudo rm /etc/systemd/network/05-eth0.network sudo rm /etc/netplan/00-installer-config.yaml sudo nano /etc/netplan/00-installer-config.yaml
For the primary AD-DC:
network:
version: 2
renderer: networkd
ethernets:
eth0:
dhcp4: no
dhcp6: no
addresses:
- 192.168.133.69/17 # Private IPv4 address.
- 139.177.192.228/24 # Your Linode's public IPv4 address.
gateway4: 139.177.192.1 # Primary IPv4 gateway.
nameservers:
search: [test.local] # Search domain.
addresses: [8.8.8.8] # DNS Server IP addresses.
For a replication AD-DC:
network:
version: 2
renderer: networkd
ethernets:
eth0:
dhcp4: no
dhcp6: no
addresses:
- 192.168.131.39/17 # Private IPv4 address.
- 139.177.196.132/24 # Your Linode's public IPv4 address.
gateway4: 139.177.196.1 # Primary IPv4 gateway.
nameservers:
search: [test.local] # Search domain.
addresses: [192.168.133.69] # DNS Server IP addresses.
Apply:
sudo netplan apply
On Linode’s dashboard, go to Configurations > Edit > Disable Auto-configure networking > Save Changes for both VMs. Then reboot!
Disable IPv6 on /etc/sysctl.conf, append these lines:
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1
Apply and reboot:
sudo sysctl -p sudo reboot
Disable IPv6 also on /etc/default/grub, adding ipv6.disable=1 like shown:
GRUB_CMDLINE_LINUX_DEFAULT="autoinstall ds=nocloud-net;seedfrom=http://10.0.2.2:8309/ net.ifnames=0 ipv6.disable=1" GRUB_CMDLINE_LINUX="console=ttyS0,19200n8 net.ifnames=0 ipv6.disable=1"
Apply and reboot:
sudo update-grub2 sudo reboot
Check if the DNS servers are configured as needed:
systemd-resolve --status