How to only allow Internet access to my Floating IP and block Internet access to the other droplet IP's

Posted May 1, 2021 165 views
NetworkingClusteringUbuntu 18.04

I am using a Floating IP to access one droplet in a group of droplets. Now I need to block public Internet access to the other droplets in the group and only allow access to the droplet assigned the Floating IP. I am running Ubuntu 18.04 LTS. How can I achieve this with UFW?

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1 answer

Hi there,

With UFW I believe that you could deny the traffic for a specific interface.

To do so, you would need to first find out the interface for your static IP, you can do that with the ip a or the ifconfig commands.

After that to deny the inbound traffic you could use the following:

ufw deny in on eth0123

Note that you would need to change the eth0123 part with the interface that you want to deny access to.

Hope that this helps.