Guide
Port check — Common searches and answers
A port check tries whether common service doors (22, 25, 80, 443, 3306…) answer on the target. Searches like “is the port open”, “check 443” and “SSH port” land here. Use it only on your server or a target you are written to test. Unauthorised scanning breaks law and the host contract.
What an open port means
Open means a process answered SYN on that door. Open 443 with a valid certificate means HTTPS works. Open 22 with a weak password grows the attack surface. Closed or timeout means firewall, NAT or a stopped service. “Closed” is not always safer; a bad rule also cuts mail.
Webify tries common ports from a list or the number you type. The result is outside visibility; a service open on localhost but closed outside looks closed. That is expected NAT behaviour.
Which port does what
80 is HTTP, 443 HTTPS, 22 SSH, 25/465/587 mail, 3306 MySQL, 5432 PostgreSQL, 6379 Redis, 2083/2087 cPanel. Databases and Redis must not face the internet in production. 25 is blocked outbound on many home and cloud networks; that does not mean your server is broken.
Permission and safety
Unauthorised port scanning is treated as an access attempt under criminal and contract law. If you scan a client server, keep written approval and an IP log. The tool keeps a low rate; there is no exploit. Closing a door you see open is firewall and service config in your panel.
Pre-launch check and search intent
On a new VDS: open 22 with keys and an IP allow-list, open 80/443 for the web, listen on 25 only if this host is mail and the provider allows it, keep 3306/6379 on localhost. Searches like “is the port open”, “check 443”, “change SSH port” belong here. Moving 22 to 2222 is not safety by itself; scanners still scan; restrict and keys do the work.
If the origin sits behind a WAF or CDN, open 443 only to CDN IPs. If origin is visible from the internet, this tool will say “open”; that is a leak. Leaving panel ports (2083, 2087) on the world invites brute force. The result is for your browser only; it is not published. Do not write a loop to burn the quota.