List of Port numbers in Windows
Below is the list of TCP/UDP port numbers being used in Windows
| Port | TCP | UDP | Description |
| 9 | UDP | Wake-on-LAN | |
| 20 | TCP | UDP | FTP data transfer |
| 21 | TCP | FTP control (command) | |
| 22 | TCP | UDP | Secure Shell (SSH) — used for secure logins, file transfers (scp, sftp) and port forwarding |
| 23 | TCP | UDP | Telnet protocol—unencrypted text communications |
| 25 | TCP | Simple Mail Transfer Protocol (SMTP) used for e-mail routing between mail servers | |
| 42 | TCP | UDP | Windows Internet Name Service |
| 53 | TCP | UDP | Domain Name System (DNS) |
| 57 | TCP | Mail Transfer Protocol (RFC 780) | |
| 67 | UDP | Bootstrap Protocol (BOOTP) Server; also used by Dynamic Host Configuration Protocol (DHCP) | |
| 68 | UDP | Bootstrap Protocol (BOOTP) Client; also used by Dynamic Host Configuration Protocol (DHCP) | |
| 69 | UDP | Trivial File Transfer Protocol (TFTP) | |
| 80 | TCP | Hypertext Transfer Protocol (HTTP) | |
| 88 | TCP | UDP | Kerberos—authentication system |
| 115 | TCP | Simple File Transfer Protocol (SFTP) | |
| 119 | TCP | Network News Transfer Protocol (NNTP) —retrieval of newsgroup messages | |
| 123 | UDP | Network Time Protocol (NTP)—used for time synchronization | |
| 135 | TCP | UDP | DCE endpoint resolution |
| 135 | TCP | UDP | Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service,[15] used to remotely manage services including DHCP server, DNS server and WINS. |
| 137 | TCP | UDP | NetBIOS NetBIOS Name Service |
| 138 | TCP | UDP | NetBIOS NetBIOS Datagram Service |
| 139 | TCP | UDP | NetBIOS NetBIOS Session Service |
| 143 | TCP | Internet Message Access Protocol (IMAP)— management of email messages | |
| 161 | UDP | Simple Network Management Protocol (SNMP) | |
| 162 | TCP | UDP | Simple Network Management Protocol Trap (SNMPTRAP)[18] |
| 389 | TCP | UDP | Lightweight Directory Access Protocol (LDAP) |
| 401 | TCP | UDP | UPS Uninterruptible Power Supply |
| 443 | TCP | Hypertext Transfer Protocol over TLS/SSL (HTTPS) | |
| 445 | TCP | Microsoft-DS Active Directory, Windows shares | |
| 445 | TCP | Microsoft-DS SMB file sharing | |
| 464 | TCP | UDP | Kerberos Change/Set password |
| 530 | TCP | UDP | RPC |
| 543 | TCP | klogin, Kerberos login | |
| 544 | TCP | kshell, Kerberos Remote shell | |
| 546 | TCP | UDP | DHCPv6 client |
| 547 | TCP | UDP | DHCPv6 server |
| 636 | TCP | UDP | Lightweight Directory Access Protocol over TLS/SSL (LDAPS) |
| 647 | TCP | DHCP Failover protocol[24] | |
| 989 | TCP | UDP | FTPS Protocol (data): FTP over TLS/SSL |
| 1812 | TCP | UDP | radius, RADIUS authentication protocol |
| 1813 | TCP | UDP | radacct, RADIUS accounting protocol |
| 3389 | TCP | UDP | Microsoft Terminal Server (RDP) |
| 6600 | TCP | Microsoft Hyper-V Live |
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