Question relating to firewall and port opening

ℹ️ Support 📦 Appliances (Docker, Snappy, VM, NCP, AIO)
1

I just recently realized something that I can’t make sense of. I am running Nextcloud AIO 6.4.0 on a VPS, and I just noticed I have my firewall (ufw) enabled, but it is only supposed to allow traffic for SSH, and none of the ports that I should open are. However, everything is working fine.

Is there a reason that this should be the case?

2

Can you double check that ufw is actually active ?

sudo ufw status

3

Yes, it is active and shows:

Status: active

To                         Action      From
--                         ------      ----
22/tcp                     ALLOW       Anywhere                  
22/tcp (v6)                ALLOW       Anywhere (v6)
4

This is a known issue of UFW in conjunction with Docker. See here: GitHub - chaifeng/ufw-docker: To fix the Docker and UFW security flaw without disabling iptables

Another way to get around this would be to use the firewall of your VPS provider, if they provide one.

5

Thanks for the information. Marked as solution.