# Open Firewall on Oracle Cloud

From Instance detail click on subnet link

<figure><img src="/files/htw2HfoJbdheDS6cCcsD" alt=""><figcaption></figcaption></figure>

On subnet page, select Default security list

<figure><img src="/files/nZK6HJMDhmGMX4ojW5Vy" alt=""><figcaption></figcaption></figure>

Then Add new Ingress rule

<figure><img src="/files/jZbLTkaJbFcRXG1tTvb9" alt=""><figcaption></figcaption></figure>

Open All ports by set Source to 0.0.0.0/0 and All Protocols

<figure><img src="/files/2PKJlHZENyHDVJU5IZ8U" alt=""><figcaption></figcaption></figure>

You may open specified port only by select TCP protocol, and input source and destination ports


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.tinyinstaller.top/firewall-guides/open-firewall-on-oracle-cloud.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.