---
title: Blocking traffic from a specific IP address.
description: Learn how to block traffic from a specific IP address.
url: /kb/guide/traffic-spikes
canonical_url: "https://vercel.com/kb/guide/traffic-spikes"
published: 2025-11-03
last_updated: 2025-11-10
authors: DX Team
related:
  - /docs/security/vercel-waf/examples
  - /docs/security/vercel-waf/custom-rules
install_vercel_plugin: npx plugins add vercel/vercel-plugin
---
<!-- docsgraph:related -->
## Related pages

> **For AI agents:** Follow these links to understand how this page connects to the rest of the Vercel ecosystem. For the full cross-link map (inbound, outbound, prerequisites, and semantic neighbors), see the .graph.md link below.

- [Examples](https://vercel.com/docs/vercel-firewall/vercel-waf/examples?from=related) — Learn how to use Vercel WAF to protect your site in specific situations.
- [IP Blocking](https://vercel.com/docs/vercel-firewall/vercel-waf/ip-blocking?from=related) — Learn how to customize the Vercel WAF to restrict access to certain IP addresses.
- [Web Application Firewall](https://vercel.com/docs/vercel-firewall/vercel-waf?from=related) — Learn how to secure your website with the Vercel Web Application Firewall \(WAF\)
- [System Bypass Rules](https://vercel.com/docs/vercel-firewall/vercel-waf/system-bypass-rules?from=related) — Learn how to configure IP-based system bypass rules with the Vercel Web Application Firewall \(WAF\).
- [Firewall Observability](https://vercel.com/docs/vercel-firewall/firewall-observability?from=related) — Learn how firewall traffic monitoring and alerts help you react quickly to potential security threats.
- [Suspicious Traffic in Specific Countries](https://vercel.com/kb/guide/suspicious-traffic-in-specific-countries?from=related) — Learn how to block traffic in specific geographical regions.
- [Block PHP requests](https://vercel.com/kb/guide/block-php-requests?from=related) — Learn how to block traffic looking for .php vulnerabilies.
- [Limit Abuse with Rate Limiting](https://vercel.com/kb/guide/limit-abuse-with-rate-limiting?from=related) — Learn how to protect your authentication endpoints against abuse.
- [How to resolve IP blocking issues ](https://vercel.com/kb/guide/how-to-resolve-ip-blocking-issues?from=related) — Learn to troubleshoot IP blocking issues for both shared and personal networks.

Full cross-link map for this page: [/kb/guide/traffic-spikes.graph.md](/kb/guide/traffic-spikes.graph.md)
<!-- /docsgraph:related -->


**Scenario**: When reviewing your site's traffic in the live monitor of your project's **Firewall** tab, you notice a traffic spike coming from the IP address `11.22.33.44`.

> You view the traffic by IP Address by selecting **Allowed Requests** from the traffic grouping drop-down and **IP Address** for the secondary drop-down

1. Select your project from the Vercel [dashboard](/dashboard) and select the **Firewall** tab.
   
2. Scroll down to the **IP Blocking** section and select the **\+ Add IP** button.
   
3. In the **Configure New Domain Protection** modal, type `11.22.33.44` for the IP Address field and match the Host field with the domain of your production deployment.
   
4. Select the **Create IP Block Rule** button.
   
5. Apply the changes:
   
   - When you make any change, you will see a **Review Changes** button appear or update on the top right with the number of changes requested
     

- Select **Review Changes** and review the changes to be applied
  
- Select **Publish** to apply the changes to your production deployment
  

1. Review the live monitor. The traffic from `11.22.33.44` should now be zero.
   

## More resources

- [WAF examples](/docs/security/vercel-waf/examples)
  
- [WAF custom rules](/docs/security/vercel-waf/custom-rules)