Scan common ports on any host to check which services are open.
Leave custom ports blank to scan 19 common ports: 21 (FTP), 22 (SSH), 23 (Telnet), 25 (SMTP), 53 (DNS), 80 (HTTP), 110 (POP3), 143 (IMAP), 443 (HTTPS), 465 (SMTPS), 587 (Submission), 993 (IMAPS), 995 (POP3S), 3306 (MySQL), 3389 (RDP), 5432 (PostgreSQL), 6379 (Redis), 8080 (HTTP-Alt), 8443 (HTTPS-Alt). Ports are checked one at a time, so scanning many ports can take up to ~40 seconds.