# How do I troubleshoot internal (to external targets) brute force attack?

Learn how to prevent internal (to external targets) brute force attacks step-by-step.  

Follow the steps below to apply the ingress filter: 

**Step 1:** [Login](https://customer.acecloudhosting.com/index.php?m=ace_product_register_addon\&action=login) to your account.

<figure><img src="/files/aD7buJolK7ihG3Sz7rVa" alt=""><figcaption></figcaption></figure>

**Step 2:** Click on **Security Groups** under **the Network** category from the left panel.

<figure><img src="/files/EcQ3zFKiyzRxTTa9lwXK" alt=""><figcaption></figcaption></figure>

**Step 3:** Click on the **Security Group** name to edit incoming/outgoing traffic on your instances.

<figure><img src="/files/pPkUINSFtG3qNtMimVAS" alt=""><figcaption></figcaption></figure>

**Step 4:** Click on **Create New** **Rule** to set a rule in the security group.

<figure><img src="/files/Qqc94CePoixRNW1WXh4T" alt=""><figcaption></figcaption></figure>

**Step 5:** Fill in all the necessary details such as **Type**, **Rule, Description, CIDR, Port**, etc. Click [here](https://customer.acecloudhosting.com/index.php?rp=/knowledgebase/20/How-to-block-all-the-outbound-traffic-while-allowing-SSH-connections-.html) to learn more about these details.

Click on **Submit**.

<figure><img src="/files/DFL4A3Sp4TleDLY9x2XQ" alt=""><figcaption></figcaption></figure>


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