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Port Checker
Check if a TCP port is open, closed, or filtered on any host
Check
Web
80 HTTP
443 HTTPS
8080 Alt
8443 Alt
Mail
25 SMTP
465 SMTPS
587 TLS
993 IMAP
Remote
22 SSH
3389 RDP
21 FTP
DB
3306 MySQL
5432 PgSQL
6379 Redis
27017 Mongo