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armbian on odroid c2 is there any default firewall

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I'm a newbie and want to start my tour with my odroid c2


for the beginn i want to install a vnc server.

So i tried to setup the port 5901 tcp (opoen/free)

if i try  ufw allow 5901/tcp i get ufw not found

if i try iptables -a ........ dport 5901  i get dport not found



So my question, is there any firwall on the default system?


Thank you a lot

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There is not. Install iptables or nftables or a framework like ufw via apt that makes use of either one of those.

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