Oracle OCI Compute Ubuntu 18.04 Instance Open Port 80

Amending Iptables

2. 2. Amending Iptables

   So now provide to Fix Iptables
   First, to Remove or Flush the Existing Rules use:

   sudo iptables -F

   Especially relevant: on a Trial Account you’ll need to Execute this Command after every Reboot!
   Finally, to Check the IPTABLES Rules play:

   iptables -S

   No Rebooting is Needed, the Setup is Automatically Effective.

Then finally, All the Traffic on Ports will be Ruled just by the defined ‘Security Rules‘!