1. Port 21- File Transfer Protocol (FTP)
2. Port 22-Secure Shell (SSH)
3. Port 23 - Telnet
4. Port 25 - Simple Mail Transfer Protocol (SMTP)
5. Port 53- Domain Name System (DNS)
6. Port 69 - TFTP
7. Port 80, 443, 8080, 8443n- HTTP/HTTPS
8. Port 135- Windows RPC
9. Port 137-139 - Windows NetBIOS over TCP/IP
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