Fix Digital Ocean droplet error no connection

fix_do_droplet_internet.md

From here with modifications, https://www.digitalocean.com/community/questions/no-internet-connection-after-droplet-reboot

1. Open DO droplet control panel, open networking, save publicipv4, gateway, netmask
2. Open Access in control panel, open recovery console
3. Check active network adapter with this command

ip link ls up

if eth0/eth1 not showing, continue

4. Get mac address in here

/etc/netplan/50-cloud-init.yaml

5. Create file "/etc/udev/rules.d/70-persistent-net.rules" and add this if not available, edit it to match your mac address

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="please_enter_your_mac_address", NAME="eth0"

example:
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="22:28:20:7d:b8:f2", NAME="eth0"

6. Assign your ip and netmask and activate the device

sudo ifconfig eth0 {your_publicip} netmask {your_netmask} up

example:
sudo ifconfig eth0 207.154.193.4 netmask 255.255.240.0 up

or if ifconfig is not available use

ip a add {your_publicip}/{your_netmask} dev eth0
ip link set dev eth0 up

example:
ip a add 207.154.193.4/255.255.240.0 dev eth0
ip link set dev eth0 up

8. Set gateway

ip route add default via {your_gateway}

example:
ip route add default via 207.154.192.1

9. Change dns resolver, edit nameserver value in this file to 1.1.1.1 or 8.8.8.8 or another dns

sudo nano /etc/resolv.conf

10. Install cloud-init

sudo apt update
sudo apt upgrade
sudo apt install cloud-init

Now you should be able to run "sudo reboot" without losing network connection.

11. [Optional] Install landscape-sysinfo command which is used to show server information on your welcome screen when you connect to your server.

sudo apt install ufw
sudo apt install landscape-common

Last edit: 28-09-2022