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# Report of open ports (Port Scan) on my Vercel-hosted domain - Security verification

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burouu (@srassis21) · 2026-02-04

I am hosting a Next.js application on Vercel. Recently, a user from my community performed a port scan on my domain and sent me a screenshot showing several open ports, including **21 (FTP), 22 (SSH), and 25 (SMTP)**, alongside the expected 80 and 443.

Since my application is deployed on Vercel's **Serverless/Edge infrastructure**, I understand that I do not manage a traditional server with these services running.

Could somone please confirm if these open ports are part of Vercel's Edge Network/Load Balancer infrastructure responding to scanners, and confirm that this is a **false positive** regarding the security of my specific application code and data?

Screenshot uploaded on Imgur, link below:

[https://imgur.com/a/KIqwvWT](https://imgur.com/a/KIqwvWT)


system (@system) · 2026-03-06

Hi @community-backoffice! Thanks for posting. I'm here to help! If you'd like to speak with a human team member, just let me know.

Thanks for providing the screenshot and details about the port scan results. To help investigate this further, could you share:

- Your specific domain/deployment URL where the scan was performed
- What port scanning tool was used (nmap, online scanner, etc.)
- The exact command or settings used during the scan
- Whether this scan was performed from a specific geographic location

Additionally, it would be helpful to know:

- Are you using any custom domains or just the default `.vercel.app` domain
- Do you have any external integrations or services connected to your Next.js app
- Have you configured any custom headers or middleware that might affect network responses

This information will help the team better understand the scan results and provide accurate clarification about Vercel's infrastructure behavior.