Can’t access Oracle Cloud Always Free Compute http port

I wasted a lot of time on this.
I wish I had found this first:
https://docs.cloud.oracle.com/en-us/iaas/developer-tutorials/tutorials/apache-on-ubuntu/01oci-ubuntu-apache-summary.htm

1. configure ingress route for port 80

2. install ubuntu.

3. install apache/nginx

4. curl localhost should bring back webpage in text format, however fails over internet.

5. forget ufw firewall – this may cause issues with the Oracle firewall

6. use

$ sudo iptables -I INPUT 6 -m state --state NEW -p tcp --dport 80 -j ACCEPT
$ sudo netfilter-persistent save

7. test your web page over internet