NomaPort
Free tool

Free one-time port scan

Enter your email and a public IP address you are authorised to test. After confirmation, you receive a basic report on open-port risks and practical next steps.

Network port risk assessment dashboard

Start your scan

Start your scan

Free, one-time external check. Private networks and reserved ranges are blocked.

IPv4 only. Do not scan addresses you do not own or have permission to test.

This is a limited external reconnaissance check, not a penetration test or compliance audit.

What you get

A quick external risk snapshot

Designed for small businesses checking exposure before investing in continuous monitoring.

Common port coverage

We check widely abused services such as RDP, SMB, databases and remote admin ports.

Email-confirmed only

Scans run only after you verify your address — reducing abuse and keeping our infrastructure safe.

Actionable findings

Each open port is explained in plain language with severity guidance.

Built to avoid abuse

Aggressive scanning can get infrastructure blocked. We use conservative methods to protect our platform and the internet.

  • •Passive reconnaissance first (Shodan InternetDB) — no probing when data is available
  • •Slow, limited active TCP checks only as fallback
  • •Rate limits per email, IP and globally
  • •Private, loopback and reserved ranges blocked

How it works

One free scan per email

  1. 1

    Submit email and IP

    Use a public IPv4 address your organisation owns or manages.

  2. 2

    Confirm via email

    We send a secure link — the scan starts only after you click it.

  3. 3

    Review your report

    See open ports, risk level and recommendations. Upgrade to NomaPort Check for ongoing monitoring.

One scan shows exposure — Check keeps watch

Move from a snapshot to ongoing device posture monitoring, alerts and monthly reports.

Explore NomaPort Check