> For the complete documentation index, see [llms.txt](https://docs.acecloud.ai/knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.acecloud.ai/knowledge-base/network/how-do-i-troubleshoot-internal-to-external-targets-brute-force-attack.md).
# 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.
**Step 2:** Click on **Security Groups** under **the Network** category from the left panel.
**Step 3:** Click on the **Security Group** name to edit incoming/outgoing traffic on your instances.
**Step 4:** Click on **Create New** **Rule** to set a rule in the security group.
**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**.