| 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 |
DC Locator |
Local Security Authority |
| 389 |
TCP |
LDAP Server |
Distributed File System |
| 389 |
UDP |
DC Locator |
Distributed File System |
| 389 |
UDP |
DC Locator |
Netlogon |
| 389 |
UDP |
DC Locator |
Kerberos Key Distribution Center |
| 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 |
UDP |
Kerberos Password V5 |
Kerberos Key Distribution Center |
| 464 |
TCP |
Kerberos Password V5 |
Kerberos Key Distribution Center |
| 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 |
| 5722 |
TCP |
RPC |
Distributed File System Replication |
| 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 |