IP y red

Open Port Checker

Escaneando los principales puertos TCP del servidor: HTTP, SSH, SMTP, MySQL y más.

Datos clave

Open port checker: enter an IP or a domain and the scanner tries 21 common TCP ports (80, 443, SSH, SMTP, MySQL, RDP and more), then shows which ones accept connections. It is free, needs no sign-up and runs from our server, so you get the view from outside.

Precio: Gratis
Registro: No necesario
Procesamiento: Our server opens the connections, not your browser, so you see reachability from the outside. The target first passes an SSRF guard: local and private addresses are never scanned
Entrada: An IP address or a domain (https:// is fine; any port or path in the address is ignored). You cannot pick ports — a fixed list is checked
Límites: 10 checks per minute per IP and no daily cap; each of the 21 ports gets a 2-second timeout and they are tried one after another; for a domain with several addresses only the first one is scanned (IPv4 preferred)
Resultado: The target and its IP, counts of open and closed ports, a port / service / open-or-closed table, and the connect time in ms for open ports
Última actualización: 2026-10-26

Open port checker

The scanner connects in turn to 21 common TCP ports on a server — web (80, 443, 8080, 8443), SSH, FTP, mail, DNS, databases (MySQL, PostgreSQL, Redis, MongoDB), RDP and VNC — and shows which ones accept connections from the internet. The check runs from our server, so “closed” can mean a closed port or one filtered by a firewall.

21 common TCP ports in one scan

Connection time for every open port

Accepts an IP address or a domain

An outside view: what any client on the internet sees

Cómo usar

Enter the server's IP address or domain
Wait while 21 ports are tested (up to 2 seconds each)
Compare the open ports with what really should be reachable from the internet

FAQ

Enter the IP address or domain and press Scan. The tool connects to 21 common TCP ports one after another and marks those that accept the connection. To test a single port by hand, use nc -zv host port on Linux and macOS or Test-NetConnection in PowerShell.

Enter your router's external IP address (the My IP tool shows it) and the scanner reports which of the listed ports, such as 80, 443, 3389 or 5900, are reachable from the internet. If forwarding is set up but the port shows closed, a device firewall or carrier-grade NAT at your ISP is often the cause.

Closed means our server could not complete a TCP connection within 2 seconds. Typical reasons: the service listens on 127.0.0.1 only, a firewall or cloud security group drops the traffic, or access is limited to certain IPs. The tool has no “filtered” status to separate these cases.

A fixed set: 21, 22, 23, 25, 53, 80, 110, 143, 443, 465, 587, 993, 995, 3306, 3389, 5432, 5900, 6379, 8080, 8443 and 27017. You cannot enter a custom port or range, and only TCP is tested — UDP is not.

You can type any public address, but scan only servers you own or have the owner's permission to test; probing other people's systems without consent is not acceptable. The tool refuses local and private addresses such as 192.168.x.x and 10.x.x.x.

Up to 10 checks per minute per IP, with no daily cap. Ports are probed in parallel with a 4-second overall budget, so even a target that silently drops everything finishes quickly.

PromoPilot frente a alternativas: comparación

Comparamos solo lo que está confirmado en las páginas de cada servicio. Donde no pudimos confirmar un dato, la celda muestra "—".

Parámetro	PromoPilot	mojeip.io	webp.pl	DNS Robot	CanYouSeeMe.org	Pentest-Tools
Free use and limits	Free; 10 checks a minute, no daily cap	Free; limits not stated	Free; limits not stated	Free; up to 30 ports per scan	Free utility; limits not stated	7-day free trial; free-tier terms not shown on the page
Works without sign-up	✓	✓	✓	—	—	—
Where the scan runs from	Our server	mojeip.io servers	—	—	—	Pentest-Tools cloud
Precio del plan de pago	No paid plan	—	—	—	—	—
Any port by number	✗	✓	✓ (custom list and ranges)	✓	✓	✓ (up to all 65,535 ports)
Several ports in one run	✓ (21 fixed ports)	✗	✓	✓	—	✓
UDP check	✗	✓	✓ (5 basic ports)	✗	—	✓
“Filtered” status	✗	✗	✓	✓	—	—

Desplaza la tabla hacia los lados

Dónde somos más débiles: We are weaker when you need a specific port: the 21-port list is fixed, there is no UDP or range scanning, and “closed” cannot tell a firewall from no service. For custom ports and UDP pick one of the other tools.

Cuándo elegir PromoPilot: A fixed list of 21 TCP ports, 10 checks a minute, no sign-up; UDP, custom ports and ranges are not supported and there is no “filtered” status

Comprobado el: 2026-10-16. "—" significa que no está confirmado en la página oficial; las condiciones y los precios cambian, así que consulta los sitios de cada servicio.