How do I prevent other domains from using my droplet public IP?

Question

I recently created a droplet and then assigned a floating IP to it. I configured the floating IP in my DNS manager and everything works as expected. However, I noticed that my website was getting traffic from other domains, and when I use the DNS checker to see what IP they were connected to, to my surprise it was the public IP of my droplet. How do I prevent this in future and even more important, how do I fix this?

Answer 1

alexdo November 21, 2019

Hello, @infoeaaabfa9d9d74bdeabae1b

Floating IP’s are primarily designed for use with load-balanced configurations. Can you please let me know why you’re using a floating IP address? I would like to have a general idea about your server setup.

Can you please double check your logs and see which IP addresses are/were accessing your sites?

Let me know how it goes.

Regards,
Alex

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infoeaaabfa9d9d74bdeabae1b November 21, 2019

My initial understanding was that I needed the floating IP to have my droplet accessible publicly, but, after I understood that this was not the case, I unassigned and removed it.

I checked my access log and I can see request from these two domains, coreone.xyz and travelmove.co . This domains don’t belong to me and I never gave my public IP to anyone.

I played around with the public IP by adding 1 and two i.e https://142.93.131.118 and https://142.93.131.119 and I can access this guy’s website. My bet is whoever is pointing there domain to my public IP also guessed it.

My question now is, how do I fix it? I was previously using Azure and I never had this issue, in fact you get a blank and sometimes an error when you try to access the public IP of their servers.
Reply Report
- infoeaaabfa9d9d74bdeabae1b November 22, 2019
  
  Thanks to the DigitalOcean support guys. Apparently, this is a known issue and you can find solutions that others use in the links below:
  
  http://serverfault.com/questions/146621/is-there-anything-i-can-do-about-someone-who-has-pointed-their-domain-at-my-ip
  http://serverfault.com/questions/118608/another-domain-name-pointing-to-my-server-ip
  
  I used the Apache default site config method and created another site config for my domain.
  
  Reply Report
  
  alexdo November 23, 2019
  
  Hello, @infoeaaabfa9d9d74bdeabae1b
  
  Thanks for sharing this, as other people may find it useful!
  
  Regards,
  Alex
  
  Reply Report

Answer 2

infoeaaabfa9d9d74bdeabae1b November 21, 2019

My initial understanding was that I needed the floating IP to have my droplet accessible publicly, but, after I understood that this was not the case, I unassigned and removed it.

I checked my access log and I can see request from these two domains, coreone.xyz and travelmove.co . This domains don’t belong to me and I never gave my public IP to anyone.

I played around with the public IP by adding 1 and two i.e https://142.93.131.118 and https://142.93.131.119 and I can access this guy’s website. My bet is whoever is pointing there domain to my public IP also guessed it.

My question now is, how do I fix it? I was previously using Azure and I never had this issue, in fact you get a blank and sometimes an error when you try to access the public IP of their servers.
Reply Report
- infoeaaabfa9d9d74bdeabae1b November 22, 2019
  
  Thanks to the DigitalOcean support guys. Apparently, this is a known issue and you can find solutions that others use in the links below:
  
  http://serverfault.com/questions/146621/is-there-anything-i-can-do-about-someone-who-has-pointed-their-domain-at-my-ip
  http://serverfault.com/questions/118608/another-domain-name-pointing-to-my-server-ip
  
  I used the Apache default site config method and created another site config for my domain.
  
  Reply Report
  
  alexdo November 23, 2019
  
  Hello, @infoeaaabfa9d9d74bdeabae1b
  
  Thanks for sharing this, as other people may find it useful!
  
  Regards,
  Alex
  
  Reply Report

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