Is a firewall test the same as an open port check?

They are closely related. A firewall test often includes checking whether specific ports are open, closed, or filtered from the public internet.

Can this help me verify port forwarding?

Yes. If you forward a port on your router, an external test can help confirm whether that port is actually reachable from outside your network.

Who should use TestMyFirewall.com?

Home users, small businesses, IT staff, gamers, self-hosters, and anyone who needs to test router firewall behavior, exposed ports, or remote service reachability.

Online Firewall Test and Open Port Checker

Why use TestMyFirewall.com

The goal is simple - show whether your connection is actually reachable from outside your network, and help you understand what to do next.

Check Open Ports

Scan common or custom ports to see what is accessible from the public internet.

Test Port Forwarding

Verify that your router forwarding rules are working the way you intended.

Firewall Test

See whether your firewall is exposing, blocking, or filtering the services you care about.

Real-World Results

External checks are more useful than just looking at settings inside your own network.

Common use cases

Firewall and port tests matter most when something needs to work from outside your local network.

Remote Desktop, VNC, and remote support tools
Game servers and peer-to-peer connections
Web servers, HTTPS apps, and self-hosted services
NAS systems, Plex, security cameras, and smart home devices
Small business firewalls, routers, and branch office connectivity

What an online firewall test tells you

It helps separate configuration assumptions from what the internet can actually see.

Whether a port appears open, closed, or filtered
Whether a forwarded service is reachable from outside
Whether your firewall or router is blocking traffic you expected to allow
Whether a service is listening at all, versus a pure firewall problem
Where to focus next when remote access is not working

About TestMyFirewall.com

TestMyFirewall.com has roots going back to 2002. The focus is still the same - practical firewall testing, open port checks, and clear results that help people solve real connectivity problems.

How it works

1

Enter the target

Provide an IP address, hostname, or service you want to verify from outside your network.

2

Choose common or custom ports

Test web, remote access, media, gaming, or other service ports that matter to your setup.

3

Review the result

See whether the service appears reachable and use that result to guide firewall or router troubleshooting.

Frequently asked questions

These answers cover the most common questions about online firewall tests, open ports, and router forwarding checks.

An online firewall test checks whether ports and services on your internet connection are reachable from outside your network. It shows what a remote system may actually be able to access.

They are closely related. A firewall test often includes checking whether a specific port appears open, closed, or filtered from the public internet.

Yes. If you forward a port on your router, an external check can help confirm whether that port is reachable from outside your network.

Home users, self-hosters, gamers, IT support staff, and small businesses can all benefit from external firewall testing when they need to troubleshoot reachability.

TestMyFirewall.com has roots going back to 2002, with a long-standing focus on firewall testing and internet-facing security checks.

Contact Us

Have a question about firewall testing, open ports, or port forwarding? Send a message.

General questions
Testing questions
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