Firewall only allow domain not a static IP

i would like secure a droplet with the DO firewall to only allow https requests from a specific domain as its ip changes often so cant set a static ip

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Bobby Iliev
Site Moderator
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February 6, 2023

Hi there,

The DigitalOcean firewalls are layer 4 firewalls, meaning that you can only filter TCP and UDP traffic. To be able to filter based on the domain name, you could do that via your web server, for example if you are using Nginx, then you could create a catch all Nginx server block and block all of the traffic, eg:

server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name _;
    return 412;

Then you could have your standard Nginx server block for your domain name as normal.

Site Moderator
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February 6, 2023

Hi @edwardshark,

If the IP address changes it’s going to be a little harder. Having said that, what you can do is if you know the range of the said IP to allow the range. That way if the IP changes with another from that range, you’ll still have it allowed.

Is that something you would consider?

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