網頁工具
Port Checker
Test if a TCP port is open on any host — check firewall rules, service availability, and connectivity
伺服器查詢 — 您的資料不會被儲存
免費
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無需帳號
Check a Port
21 FTP
22 SSH
25 SMTP
53 DNS
80 HTTP
443 HTTPS
3306 MySQL
5432 PostgreSQL
6379 Redis
8080 HTTP Alt
Enter a host and port above to test connectivity. Click a common port to quick-check.