Movim • Docker Punching Holes Through Your VPS Firewall? This Is How I Solved It

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Docker Punching Holes Through Your VPS Firewall? This Is How I Solved It

news.movim.eu / gadgeteerza-tech-blog • 22 March 2022

https://upload.movim.eu/files/62f168f3fbecac605d21a105beda461820293db1/iU3m9lVt0LLO/Docker_VPS.jpg

Yes, Docker containers automatically reconfigure the IPTable rules, and do not show up under UFW status as opened ports in your VPS firewall. This can leave your management containers wide open. Most docker container tutorials only use examples of how to do basic port mapping, and this is what exposes those ports.

I explain what is happening with this, and which of the three options I found easiest to make sure only the essential ports are open.

See https://youtu.be/Kr-3WKA1_fI

#technology #selfhosting #docker #VPS #security