ping: google.com: Temporary failure in name resolution

Hello,

I have a problem with my Droplet, which I believe I caused myself and can’t get out of it. Basically I’m unable to ssh into the droplet (18.04, failed upgrade to 20.04), and can’t access outside internet from it. Below are the things I tried so far (apart from fully turning off and rebooting the droplet numerous times):

ssh into the server results in: ssh: connect to host 167.172.205.93 port 22: Connection timed out

From the droplet:

$ ping google.com
ping: google.com: Temporary failure in name resolution

Contents of /etc/systemd/resolved.conf:

[Resolve]
DNS=1.1.1.1 8.8.8.8
FallbackDns=8.8.4.4

$ ufw status
ERROR: Couldn't determine iptables version

$ ifconfig -a
lists eth0 and lo, both running

$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

source /etc/network/interfaces.d/*

auth eth0
iface eth0 inet static
  address 167.172.205.93
  netmask 255.255.240.0
  gateway 167.172.192.1
  dns-nameservers 8.8.4.4

… and probably bunch of other things which I will mention when I recall all of them… Also I don’t care about fully resurrecting the droplet, I need to make some data backup and destroy it. For that though I need outside access, besides the “Access console”.

What am I missing?

Thanks, Lukasz