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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