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jbaranski/OracleOpenPort80Centos.md

Created September 26, 2020 02:00
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Open Port 80 Oracle Cloud Compute Instance (CentOS)
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OracleOpenPort80Centos.md

Open Port 80 Oracle Cloud Compute Instance (CentOS)

FYI This was harder than it needed to be:

  1. Looking at your instance info, find VNIC section, click "Public Subnet".
  2. Click on your security list.
  3. Add a new entry with the following options:
  • "Stateless" = No, "Source" = 0.0.0.0/0, "IP Protocol" = TCP, "Source Port Range" = All, "Destination Port Range" = 80
  1. SSH to your instance.
  2. While SSH'ed in your instance, run command firewall-cmd --permanent --add-service=http.
  3. While SSH'ed in your instance, run command firewall-cmd --reload.
  4. Now start Apache, NGINX, or whatever server you need to on port 80. You can now access from the internet.
@brotskydotcom
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brotskydotcom commented Jul 26, 2025

As of 2025/07/26, using Oracle Linux 9 on an Ampere instance, these firewall-cmd rules are exactly right (modulo adding sudo), thanks so much!

For general information, the zone that's affected when you don't specify a zone is the "public" zone. You can see all the rules on that zone like this:

sudo firewall-cmd --permanent --info-zone=public

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