Comments (2)
You can change the default AWS nameserver by creating a file 99-custom-dns.yaml located at /etc/netplan:
sudo vim /etc/netplan/99-custom-dns.yaml
Contents of the file:
network:
version: 2
ethernets:
ens5:
nameservers:
addresses: [8.8.8.8, 1.1.1.1]
dhcp4-overrides:
use-dns: false
(Replace ens5 with your network interface name. )
After this reboot the machine or run:
netplan apply
To see, if new nameservers are applied correctly, run:
systemd-resolve --status
This is explained in this AWS knowledge base article:
https://aws.amazon.com/premiumsupport/knowledge-center/ec2-static-dns-ubuntu-debian/
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systemctl disable systemd-resolved.service
systemctl stop systemd-resolved
rm -rf /etc/resolv.conf
echo "nameserver 1.1.1.1" > /etc/resolv.conf
The above lines were needed previously because systemd-resolved bound the port 127.0.0.1:53 and that caused issues.
I think old version of certbot or old version of Burp Collaborator required port 53 on localhost which broke things and needed systemd-resolved to be disabled.
I think it might be possible to remove that hack now, but I'll have to test if it actually is possible.
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