> For the complete documentation index, see [llms.txt](https://docs.a-fieldtech.com/a-fieldtech-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.a-fieldtech.com/a-fieldtech-docs/compute-power/interactive-blocks.md).

# Security

### Security Group

It is a madatory requirement to apply Security Group when you deploy the ECS/BMS/LECS, you can use the default security group and create your own. And the security group has two directions.

{% tabs %}
{% tab title="In Direction" %}

<figure><img src="/files/ndSpbEcIPjsF4Es83FFm" alt=""><figcaption></figcaption></figure>
{% endtab %}

{% tab title="Out Direction" %}

<figure><img src="/files/RRHJXAc1ovc8F3ZoiCp6" alt=""><figcaption></figcaption></figure>
{% endtab %}
{% endtabs %}

{% hint style="info" %}

**Kind Tips**

* **Priority:** The optional priority range is 1-100, with a default value of 1, representing the highest priority.
* **Port Range:** The value range is 1 to 65535. For example, you can set it as "1/200" or "80/80". The value "-1/-1" cannot be set independently and indicates no port restrictions.
* **Authorization Object:** Set the CIDR for the authorization object based on your actual scenario. Note that **0.0.0.0/0** or a mask of 0 means access from all IPs is allowed or denied. Please handle this configuration with caution.
  {% endhint %}

### SSH Key

Click on "SSH Key" from and left side menu, and click on "Create" Button, and you will see this screen. Create a "Public Key Name" and paste your public key into the "Public Key" box

<figure><img src="/files/XGiBLugv8zO8pyRbGOVO" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
Question about generating your SSH Public Key?&#x20;

See [This](/a-fieldtech-docs/compute-power/interactive-blocks/generating-an-ssh-key-pair.md) or Search "Generating SSH Public Key" from public search engine
{% endhint %}