Can only connect to ssh on Oracle Cloud / Oracle Linux


I‘m trying tailscale in Oracle Always Free cloud and am having issues connecting to anything but ssh.

On Oracle Linux machine, I can connect to other services (e.g. nginx) only if i stop firewall service, otherwise connection is dropped.

On ubuntu, even disabling ufw doesn‘t help - only ssh goes through.

Any idea what the problem could be?

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i also have the free oracle cloud tier.
the VPS has enabled iptables by default which blocks everything but ssh.

you can disable it with the following commands Opening port 80 on Oracle Cloud Infrastructure Compute node - Stack Overflow