File Transfer Protocol (FTP) Ports 20-21 Mail Server (IMAP) Port 143 Mail Server (POP3) Port 110 Mail Server (SMTP) Port 25 Microsoft Directory Server (MSFT DS) Port 445 Microsoft SQL Server (MSFT SQL) Port 1433 Remote Assistance / Terminal Server (RDP) Port 3389 Remote Procedure Calls (RPC) Port 135 Secure Web Server (HTTPS) Port 443 Universal Plug and Play (UPNP) Port 5000 Web Server (HTTP) Port 80 Windows File Sharing (NETBIOS) Ports 137- 139
