Update docs/prerequisites.md
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@ -26,7 +26,7 @@ If your distro runs within an [LXC container](https://linuxcontainers.org/), you
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- Properly configured DNS records for `<your-domain>` (details in [Configuring DNS](configuring-dns.md)).
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- Properly configured DNS records for `<your-domain>` (details in [Configuring DNS](configuring-dns.md)).
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- Some TCP/UDP ports open. This playbook configures the server's internal firewall for you. In most cases, you don't need to do anything special. But **if your server is running behind another firewall**, you'd need to open these ports:
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- Some TCP/UDP ports open. This playbook (actually [Docker itself](https://docs.docker.com/network/iptables/)) configures the server's internal firewall for you. In most cases, you don't need to do anything special. But **if your server is running behind another firewall**, you'd need to open these ports:
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- `80/tcp`: HTTP webserver
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- `80/tcp`: HTTP webserver
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- `443/tcp`: HTTPS webserver
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- `443/tcp`: HTTPS webserver
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