| Port | Protocol | Application protocol | System service name |
| n/a | GRE | GRE (IP protocol 47) | Routing and Remote Access |
| n/a | ESP | IPsec ESP (IP protocol 50) | Routing and Remote Access |
| n/a | AH | IPsec AH (IP protocol 51) | Routing and Remote Access |
| 7 | TCP | Echo | Simple TCP/IP Services |
| 7 | UDP | Echo | Simple TCP/IP Services |
| 9 | TCP | Discard | Simple TCP/IP Services |
| 9 | UDP | Discard | Simple TCP/IP Services |
| 13 | TCP | Daytime | Simple TCP/IP Services |
| 13 | UDP | Daytime | Simple TCP/IP Services |
| 17 | TCP | Quotd | Simple TCP/IP Services |
| 17 | UDP | Quotd | Simple TCP/IP Services |
| 19 | TCP | Chargen | Simple TCP/IP Services |
| 19 | UDP | Chargen | Simple TCP/IP Services |
| 20 | TCP | FTP default data | FTP Publishing Service |
| 21 | TCP | FTP control | FTP Publishing Service |
| 21 | TCP | FTP control | Application Layer Gateway Service |
| 23 | TCP | Telnet | Telnet |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol |
| 25 | TCP | SMTP | Exchange Server |
| 42 | TCP | WINS Replication | Windows Internet Name Service |
| 42 | UDP | WINS Replication | Windows Internet Name Service |
| 53 | TCP | DNS | DNS Server |
| 53 | UDP | DNS | DNS Server |
| 53 | TCP | DNS | Internet Connection Firewall/Internet Connection Sharing |
| 53 | UDP | DNS | Internet Connection Firewall/Internet Connection Sharing |
| 67 | UDP | DHCP Server | DHCP Server |
| 67 | UDP | DHCP Server | Internet Connection Firewall/Internet Connection Sharing |
| 69 | UDP | TFTP | Trivial FTP Daemon Service |
| 80 | TCP | HTTP | Windows Media Services |
| 80 | TCP | HTTP | World Wide Web Publishing Service |
| 80 | TCP | HTTP | SharePoint Portal Server |
| 88 | TCP | Kerberos | Kerberos Key Distribution Center |
| 88 | UDP | Kerberos | Kerberos Key Distribution Center |
| 102 | TCP | X.400 | Microsoft Exchange MTA Stacks |
| 110 | TCP | POP3 | Microsoft POP3 Service |
| 110 | TCP | POP3 | Exchange Server |
| 119 | TCP | NNTP | Network News Transfer Protocol |
| 123 | UDP | NTP | Windows Time |
| 123 | UDP | SNTP | Windows Time |
| 135 | TCP | RPC | Message Queuing |
| 135 | TCP | RPC | Remote Procedure Call |
| 135 | TCP | RPC | Exchange Server |
| 135 | TCP | RPC | Certificate Services |
| 135 | TCP | RPC | Cluster Service |
| 135 | TCP | RPC | Distributed File System |
| 135 | TCP | RPC | Distributed Link Tracking |
| 135 | TCP | RPC | Distributed Transaction Coordinator |
| 135 | TCP | RPC | Distributed File Replication Service |
| 135 | TCP | RPC | Fax Service |
| 135 | TCP | RPC | Microsoft Exchange Server |
| 135 | TCP | RPC | File Replication Service |
| 135 | TCP | RPC | Group Policy |
| 135 | TCP | RPC | Local Security Authority |
| 135 | TCP | RPC | Remote Storage Notification |
| 135 | TCP | RPC | Remote Storage Server |
| 135 | TCP | RPC | Systems Management Server 2.0 |
| 135 | TCP | RPC | Terminal Services Licensing |
| 135 | TCP | RPC | Terminal Services Session Directory |
| 137 | UDP | NetBIOS Name Resolution | Computer Browser |
| 137 | UDP | NetBIOS Name Resolution | Server |
| 137 | UDP | NetBIOS Name Resolution | Windows Internet Name Service |
| 137 | UDP | NetBIOS Name Resolution | Net Logon |
| 137 | UDP | NetBIOS Name Resolution | Systems Management Server 2.0 |
| 138 | UDP | NetBIOS Datagram Service | Computer Browser |
| 138 | UDP | NetBIOS Datagram Service | Messenger |
| 138 | UDP | NetBIOS Datagram Service | Server |
| 138 | UDP | NetBIOS Datagram Service | Net Logon |
| 138 | UDP | NetBIOS Datagram Service | Distributed File System |
| 138 | UDP | NetBIOS Datagram Service | Systems Management Server 2.0 |
| 138 | UDP | NetBIOS Datagram Service | License Logging Service |
| 139 | TCP | NetBIOS Session Service | Computer Browser |
| 139 | TCP | NetBIOS Session Service | Fax Service |
| 139 | TCP | NetBIOS Session Service | Performance Logs and Alerts |
| 139 | TCP | NetBIOS Session Service | Print Spooler |
| 139 | TCP | NetBIOS Session Service | Server |
| 139 | TCP | NetBIOS Session Service | Net Logon |
| 139 | TCP | NetBIOS Session Service | Remote Procedure Call Locator |
| 139 | TCP | NetBIOS Session Service | Distributed File System |
| 139 | TCP | NetBIOS Session Service | Systems Management Server 2.0 |
| 139 | TCP | NetBIOS Session Service | License Logging Service |
| 143 | TCP | IMAP | Exchange Server |
| 161 | UDP | SNMP | SNMP Service |
| 162 | UDP | SNMP Traps Outbound | SNMP Trap Service |
| 389 | TCP | LDAP Server | Local Security Authority |
| 389 | UDP | LDAP Server | Local Security Authority |
| 389 | TCP | LDAP Server | Distributed File System |
| 389 | UDP | LDAP Server | Distributed File System |
| 443 | TCP | HTTPS | HTTP SSL |
| 443 | TCP | HTTPS | World Wide Web Publishing Service |
| 443 | TCP | HTTPS | SharePoint Portal Server |
| 443 | TCP | RPC over HTTPS | Exchange Server 2003 |
| 445 | TCP | SMB | Fax Service |
| 445 | TCP | SMB | Print Spooler |
| 445 | TCP | SMB | Server |
| 445 | TCP | SMB | Remote Procedure Call Locator |
| 445 | TCP | SMB | Distributed File System |
| 445 | TCP | SMB | License Logging Service |
| 445 | TCP | SMB | Net Logon |
| 464 | TCP | Kerberos Password V5 | Net Logon |
| 500 | UDP | IPsec ISAKMP | Local Security Authority |
| 515 | TCP | LPD | TCP/IP Print Server |
| 548 | TCP | File Server for Macintosh | File Server for Macintosh |
| 554 | TCP | RTSP | Windows Media Services |
| 563 | TCP | NNTP over SSL | Network News Transfer Protocol |
| 593 | TCP | RPC over HTTPS endpoint mapper | Remote Procedure Call |
| 593 | TCP | RPC over HTTPS | Exchange Server |
| 636 | TCP | LDAP SSL | Local Security Authority |
| 636 | UDP | LDAP SSL | Local Security Authority |
| 993 | TCP | IMAP over SSL | Exchange Server |
| 995 | TCP | POP3 over SSL | Exchange Server |
| 1067 | TCP | Installation Bootstrap Service | Installation Bootstrap protocol server |
| 1068 | TCP | Installation Bootstrap Service | Installation Bootstrap protocol client |
| 1270 | TCP | MOM-Encrypted | Microsoft Operations Manager 2000 |
| 1433 | TCP | SQL over TCP | Microsoft SQL Server |
| 1433 | TCP | SQL over TCP | MSSQL$UDDI |
| 1434 | UDP | SQL Probe | Microsoft SQL Server |
| 1434 | UDP | SQL Probe | MSSQL$UDDI |
| 1645 | UDP | Legacy RADIUS | Internet Authentication Service |
| 1646 | UDP | Legacy RADIUS | Internet Authentication Service |
| 1701 | UDP | L2TP | Routing and Remote Access |
| 1723 | TCP | PPTP | Routing and Remote Access |
| 1755 | TCP | MMS | Windows Media Services |
| 1755 | UDP | MMS | Windows Media Services |
| 1801 | TCP | MSMQ | Message Queuing |
| 1801 | UDP | MSMQ | Message Queuing |
| 1812 | UDP | RADIUS Authentication | Internet Authentication Service |
| 1813 | UDP | RADIUS Accounting | Internet Authentication Service |
| 1900 | UDP | SSDP | SSDP Discovery Service |
| 2101 | TCP | MSMQ-DCs | Message Queuing |
| 2103 | TCP | MSMQ-RPC | Message Queuing |
| 2105 | TCP | MSMQ-RPC | Message Queuing |
| 2107 | TCP | MSMQ-Mgmt | Message Queuing |
| 2393 | TCP | OLAP Services 7.0 | SQL Server: Downlevel OLAP Client Support |
| 2394 | TCP | OLAP Services 7.0 | SQL Server: Downlevel OLAP Client Support |
| 2460 | UDP | MS Theater | Windows Media Services |
| 2535 | UDP | MADCAP | DHCP Server |
| 2701 | TCP | SMS Remote Control (control) | SMS Remote Control Agent |
| 2701 | UDP | SMS Remote Control (control) | SMS Remote Control Agent |
| 2702 | TCP | SMS Remote Control (data) | SMS Remote Control Agent |
| 2702 | UDP | SMS Remote Control (data) | SMS Remote Control Agent |
| 2703 | TCP | SMS Remote Chat | SMS Remote Control Agent |
| 2703 | UPD | SMS Remote Chat | SMS Remote Control Agent |
| 2704 | TCP | SMS Remote File Transfer | SMS Remote Control Agent |
| 2704 | UDP | SMS Remote File Transfer | SMS Remote Control Agent |
| 2725 | TCP | SQL Analysis Services | SQL Analysis Server |
| 2869 | TCP | UPNP | Universal Plug and Play Device Host |
| 2869 | TCP | SSDP event notification | SSDP Discovery Service |
| 3268 | TCP | Global Catalog Server | Local Security Authority |
| 3269 | TCP | Global Catalog Server | Local Security Authority |
| 3343 | UDP | Cluster Services | Cluster Service |
| 3389 | TCP | Terminal Services | NetMeeting Remote Desktop Sharing |
| 3389 | TCP | Terminal Services | Terminal Services |
| 3527 | UDP | MSMQ-Ping | Message Queuing |
| 4011 | UDP | BINL | Remote Installation |
| 4500 | UDP | NAT-T | Local Security Authority |
| 5000 | TCP | SSDP legacy event notification | SSDP Discovery Service |
| 5004 | UDP | RTP | Windows Media Services |
| 5005 | UDP | RTCP | Windows Media Services |
| 6001 | TCP | Information Store | Exchange Server 2003 |
| 6002 | TCP | Directory Referral | Exchange Server 2003 |
| 6004 | TCP | DSProxy/NSPI | Exchange Server 2003 |
| 42424 | TCP | ASP.Net Session State | ASP.NET State Service |
| 51515 | TCP | MOM-Clear | Microsoft Operations Manager 2000 |
| 1024-65535 | TCP | RPC | Randomly allocated high TCP ports |
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