The Windows server system includes a comprehensive and integrated infrastructure that is designed to meet the requirements of developers and of information technology (IT) professionals. This system is designed to run programs and solutions that information workers can use to obtain, to analyze, and to share information quickly and easily. These Microsoft client, server and server program products use a variety of network ports and protocols to communicate with client systems and with other server systems over the network. Dedicated firewalls, host-based firewalls, and Internet Protocol security (IPsec) filters are other important components that are required to help secure your network. However, if these technologies are configured to block ports and protocols that are used by a specific server, that server will no longer respond to client requests.
Ports and Protocols
The following table summarizes the information from the "System Services Ports" section of this article. This table is sorted by port number instead of by the service name.
Protocol / Port - Application protocol - System service name
Protocol 47 - GRE - GRE (IP protocol 47) Routing and Remote Access
Protocol 50 - ESP - IPsec ESP (IP protocol 50) Routing and Remote Access
Protocol 51 - n/a AH IPsec AH (IP protocol 51) Routing and Remote Access
TCP Port 7 - Echo Simple TCP/IP Services
UDP Port 7 - Echo Simple TCP/IP Services
TCP Port 9 - Discard Simple TCP/IP Services
UDP Port 9 - Discard Simple TCP/IP Services
TCP Port 13 - Daytime Simple TCP/IP Services
UDP Port 13 - Daytime Simple TCP/IP Services
TCP Port 17 - Quotd Simple TCP/IP Services
UDP Port 17 - Quotd Simple TCP/IP Services
TCP Port 19 - Chargen Simple TCP/IP Services
UDP Port 19 - Chargen Simple TCP/IP Services
TCP Port 20 - FTP default data FTP Publishing Service
TCP Port 21 - FTP control FTP Publishing Service
TCP Port 21 - FTP control Application Layer Gateway Service
TCP Port 23 - Telnet Telnet
TCP Port 25 - SMTP Simple Mail Transfer Protocol
UDP Port 25 - SMTP Simple Mail Transfer Protocol
TCP Port 25 - SMTP Exchange Server
UDP Port 25 - SMTP Exchange Server
TCP Port 42 - WINS Replication Windows Internet Name Service
UDP Port 42 - WINS Replication Windows Internet Name Service
TCP Port 53 - DNS DNS Server
UDP Port 53 - DNS DNS Server
TCP Port 53 - DNS Internet Connection Firewall/Internet Connection Sharing
UDP Port 53 - DNS Internet Connection Firewall/Internet Connection Sharing
UDP Port 67 - DHCP Server DHCP Server
UDP Port 67 - DHCP Server Internet Connection Firewall/Internet Connection Sharing
UDP Port 69 - TFTP Trivial FTP Daemon Service
TCP Port 80 - HTTP Windows Media Services
TCP Port 80 - HTTP World Wide Web Publishing Service
TCP Port 80 - HTTP SharePoint Portal Server
TCP Port 88 - Kerberos Kerberos Key Distribution Center
UDP Port 88 - Kerberos Kerberos Key Distribution Center
TCP Port 102 - X.400 Microsoft Exchange MTA Stacks
TCP Port 110 - POP3 Microsoft POP3 Service
TCP Port 110 - POP3 Exchange Server
TCP Port 119 - NNTP Network News Transfer Protocol
UDP Port 123 - NTP Windows Time
UDP Port 123 - SNTP Windows Time
TCP Port 135 - RPC Message Queuing
TCP Port 135 - RPC Remote Procedure Call
TCP Port 135 - RPC Exchange Server
TCP Port 135 - RPC Certificate Services
TCP Port 135 - RPC Cluster Service
TCP Port 135 - RPC Distributed File System
TCP Port 135 - RPC Distributed Link Tracking
TCP Port 135 - RPC Distributed Transaction Coordinator
TCP Port 135 - RPC Event Log
TCP Port 135 - RPC Fax Service
TCP Port 135 - RPC File Replication
TCP Port 135 - RPC Local Security Authority
TCP Port 135 - RPC Remote Storage Notification
TCP Port 135 - RPC Remote Storage Server
TCP Port 135 - RPC Systems Management Server 2.0
TCP Port 135 - RPC Terminal Services Licensing
TCP Port 135 - RPC Terminal Services Session Directory
UDP Port 137 - NetBIOS Name Resolution Computer Browser
UDP Port 137 - NetBIOS Name Resolution Server
UDP Port 137 - NetBIOS Name Resolution Windows Internet Name Service
UDP Port 137 - NetBIOS Name Resolution Net Logon
UDP Port 137 - NetBIOS Name Resolution Systems Management Server 2.0
UDP Port 138 - NetBIOS Datagram Service Computer Browser
UDP Port 138 - NetBIOS Datagram Service Messenger
UDP Port 138 - NetBIOS Datagram Service Server
UDP Port 138 - NetBIOS Datagram Service Net Logon
UDP Port 138 - NetBIOS Datagram Service Distributed File System
UDP Port 138 - NetBIOS Datagram Service Systems Management Server 2.0
UDP Port 138 - NetBIOS Datagram Service License Logging Service
TCP Port 139 - NetBIOS Session Service Computer Browser
TCP Port 139 - NetBIOS Session Service Fax Service
TCP Port 139 - NetBIOS Session Service Performance Logs and Alerts
TCP Port 139 - NetBIOS Session Service Print Spooler
TCP Port 139 - NetBIOS Session Service Server
TCP Port 139 - NetBIOS Session Service Net Logon
TCP Port 139 - NetBIOS Session Service Remote Procedure Call Locator
TCP Port 139 - NetBIOS Session Service Distributed File System
TCP Port 139 - NetBIOS Session Service Systems Management Server 2.0
TCP Port 139 - NetBIOS Session Service License Logging Service
TCP Port 143 - IMAP Exchange Server
UDP Port 161 - SNMP SNMP Service
UDP Port 162 - SNMP Traps Outbound SNMP Trap Service
TCP Port 389 - LDAP Server Local Security Authority
UDP Port 389 - LDAP Server Local Security Authority
TCP Port 389 - LDAP Server Distributed File System
UDP Port 389 - LDAP Server Distributed File System
TCP Port 443 - HTTPS HTTP SSL
TCP Port 443 - HTTPS World Wide Web Publishing Service
TCP Port 443 - HTTPS SharePoint Portal Server
TCP Port 443 - RPC over HTTP Exchange Server 2003
TCP Port 445 - SMB Fax Service
TCP Port 445 - SMB Print Spooler
TCP Port 445 - SMB Server
TCP Port 445 - SMB Remote Procedure Call Locator
TCP Port 445 - SMB Distributed File System
TCP Port 445 - SMB License Logging Service
TCP Port 445 - SMB Net Logon
TCP Port 464 - Kerberos Password V5 Net Logon
UDP Port 500 - IPsec ISAKMP Local Security Authority
TCP Port 515 - LPD TCP/IP Print Server
TCP Port 548 - File Server for Macintosh File Server for Macintosh
TCP Port 554 - RTSP Windows Media Services
TCP Port 563 - NNTP over SSL Network News Transfer Protocol
TCP Port 593 - RPC over HTTP endpoint mapper Remote Procedure Call
TCP Port 593 - RPC over HTTP Exchange Server
TCP Port 636 - LDAP SSL Local Security Authority
UDP Port 636 - LDAP SSL Local Security Authority
TCP Port 993 - IMAP over SSL Exchange Server
TCP Port 995 - POP3 over SSL Exchange Server
TCP Port 1067 - Installation Bootstrap Service Installation Bootstrap protocol server
TCP Port 1068 - Installation Bootstrap Service Installation Bootstrap protocol client
TCP Port 1270 - MOM-Encrypted Microsoft Operations Manager 2000
TCP Port 1433 - SQL over TCP Microsoft SQL Server
TCP Port 1433 - SQL over TCP MSSQL$UDDI
UDP Port 1434 - SQL Probe Microsoft SQL Server
UDP Port 1434 - SQL Probe MSSQL$UDDI
UDP Port 1645 - Legacy RADIUS Internet Authentication Service
UDP Port 1646 - Legacy RADIUS Internet Authentication Service
UDP Port 1701 - L2TP Routing and Remote Access
TCP Port 1723 - PPTP Routing and Remote Access
TCP Port 1755 - MMS Windows Media Services
UDP Port 1755 - MMS Windows Media Services
TCP Port 1801 - MSMQ Message Queuing
UDP Port 1801 - MSMQ Message Queuing
UDP Port 1812 - RADIUS Authentication Internet Authentication Service
UDP Port 1813 - RADIUS Accounting Internet Authentication Service
UDP Port 1900 - SSDP SSDP Discovery Service
TCP Port 2101 - MSMQ-DCs Message Queuing
TCP Port 2103 - MSMQ-RPC Message Queuing
TCP Port 2105 - MSMQ-RPC Message Queuing
TCP Port 2107 - MSMQ-Mgmt Message Queuing
TCP Port 2393 - OLAP Services 7.0 SQL Server: Downlevel OLAP Client Support
TCP Port 2394 - OLAP Services 7.0 SQL Server: Downlevel OLAP Client Support
UDP Port 2460 - MS Theater Windows Media Services
UDP Port 2535 - MADCAP DHCP Server
TCP Port 2701 - SMS Remote Control (control) SMS Remote Control Agent
UDP Port 2701 - SMS Remote Control (control) SMS Remote Control Agent
TCP Port 2702 - SMS Remote Control (data) SMS Remote Control Agent
UDP Port 2702 - SMS Remote Control (data) SMS Remote Control Agent
TCP Port 2703 - SMS Remote Chat SMS Remote Control Agent
UPD Port 2703 - SMS Remote Chat SMS Remote Control Agent
TCP Port 2704 - SMS Remote File Transfer SMS Remote Control Agent
UDP Port 2704 - SMS Remote File Transfer SMS Remote Control Agent
TCP Port 2725 - SQL Analysis Services SQL Analysis Server
TCP Port 2869 - UPNP Universal Plug and Play Device Host
TCP Port 2869 - SSDP event notification SSDP Discovery Service
TCP Port 3268 - Global Catalog Server Local Security Authority
TCP Port 3269 - Global Catalog Server Local Security Authority
UDP Port 3343 - Cluster Services Cluster Service
TCP Port 3389 - Terminal Services NetMeeting Remote Desktop Sharing
TCP Port 3389 - Terminal Services Terminal Services
UDP Port 3527 - MSMQ-Ping Message Queuing
UDP Port 4011 - BINL Remote Installation
UDP Port 4500 - NAT-T Local Security Authority
TCP Port 5000 - SSDP legacy event notification SSDP Discovery Service
UDP Port 5004 - RTP Windows Media Services
UDP Port 5005 - RTCP Windows Media Services
TCP Port 6001 - Information Store Exchange Server 2003
TCP Port 6002 - Directory Referral Exchange Server 2003
TCP Port 6004 - DSProxy/NSPI Exchange Server 2003
TCP Port 42424 - ASP.Net Session State ASP.NET State Service
TCP Port 51515 - MOM-Clear Microsoft Operations Manager 2000
Ports and Protocols
The following table summarizes the information from the "System Services Ports" section of this article. This table is sorted by port number instead of by the service name.
Protocol / Port - Application protocol - System service name
Protocol 47 - GRE - GRE (IP protocol 47) Routing and Remote Access
Protocol 50 - ESP - IPsec ESP (IP protocol 50) Routing and Remote Access
Protocol 51 - n/a AH IPsec AH (IP protocol 51) Routing and Remote Access
TCP Port 7 - Echo Simple TCP/IP Services
UDP Port 7 - Echo Simple TCP/IP Services
TCP Port 9 - Discard Simple TCP/IP Services
UDP Port 9 - Discard Simple TCP/IP Services
TCP Port 13 - Daytime Simple TCP/IP Services
UDP Port 13 - Daytime Simple TCP/IP Services
TCP Port 17 - Quotd Simple TCP/IP Services
UDP Port 17 - Quotd Simple TCP/IP Services
TCP Port 19 - Chargen Simple TCP/IP Services
UDP Port 19 - Chargen Simple TCP/IP Services
TCP Port 20 - FTP default data FTP Publishing Service
TCP Port 21 - FTP control FTP Publishing Service
TCP Port 21 - FTP control Application Layer Gateway Service
TCP Port 23 - Telnet Telnet
TCP Port 25 - SMTP Simple Mail Transfer Protocol
UDP Port 25 - SMTP Simple Mail Transfer Protocol
TCP Port 25 - SMTP Exchange Server
UDP Port 25 - SMTP Exchange Server
TCP Port 42 - WINS Replication Windows Internet Name Service
UDP Port 42 - WINS Replication Windows Internet Name Service
TCP Port 53 - DNS DNS Server
UDP Port 53 - DNS DNS Server
TCP Port 53 - DNS Internet Connection Firewall/Internet Connection Sharing
UDP Port 53 - DNS Internet Connection Firewall/Internet Connection Sharing
UDP Port 67 - DHCP Server DHCP Server
UDP Port 67 - DHCP Server Internet Connection Firewall/Internet Connection Sharing
UDP Port 69 - TFTP Trivial FTP Daemon Service
TCP Port 80 - HTTP Windows Media Services
TCP Port 80 - HTTP World Wide Web Publishing Service
TCP Port 80 - HTTP SharePoint Portal Server
TCP Port 88 - Kerberos Kerberos Key Distribution Center
UDP Port 88 - Kerberos Kerberos Key Distribution Center
TCP Port 102 - X.400 Microsoft Exchange MTA Stacks
TCP Port 110 - POP3 Microsoft POP3 Service
TCP Port 110 - POP3 Exchange Server
TCP Port 119 - NNTP Network News Transfer Protocol
UDP Port 123 - NTP Windows Time
UDP Port 123 - SNTP Windows Time
TCP Port 135 - RPC Message Queuing
TCP Port 135 - RPC Remote Procedure Call
TCP Port 135 - RPC Exchange Server
TCP Port 135 - RPC Certificate Services
TCP Port 135 - RPC Cluster Service
TCP Port 135 - RPC Distributed File System
TCP Port 135 - RPC Distributed Link Tracking
TCP Port 135 - RPC Distributed Transaction Coordinator
TCP Port 135 - RPC Event Log
TCP Port 135 - RPC Fax Service
TCP Port 135 - RPC File Replication
TCP Port 135 - RPC Local Security Authority
TCP Port 135 - RPC Remote Storage Notification
TCP Port 135 - RPC Remote Storage Server
TCP Port 135 - RPC Systems Management Server 2.0
TCP Port 135 - RPC Terminal Services Licensing
TCP Port 135 - RPC Terminal Services Session Directory
UDP Port 137 - NetBIOS Name Resolution Computer Browser
UDP Port 137 - NetBIOS Name Resolution Server
UDP Port 137 - NetBIOS Name Resolution Windows Internet Name Service
UDP Port 137 - NetBIOS Name Resolution Net Logon
UDP Port 137 - NetBIOS Name Resolution Systems Management Server 2.0
UDP Port 138 - NetBIOS Datagram Service Computer Browser
UDP Port 138 - NetBIOS Datagram Service Messenger
UDP Port 138 - NetBIOS Datagram Service Server
UDP Port 138 - NetBIOS Datagram Service Net Logon
UDP Port 138 - NetBIOS Datagram Service Distributed File System
UDP Port 138 - NetBIOS Datagram Service Systems Management Server 2.0
UDP Port 138 - NetBIOS Datagram Service License Logging Service
TCP Port 139 - NetBIOS Session Service Computer Browser
TCP Port 139 - NetBIOS Session Service Fax Service
TCP Port 139 - NetBIOS Session Service Performance Logs and Alerts
TCP Port 139 - NetBIOS Session Service Print Spooler
TCP Port 139 - NetBIOS Session Service Server
TCP Port 139 - NetBIOS Session Service Net Logon
TCP Port 139 - NetBIOS Session Service Remote Procedure Call Locator
TCP Port 139 - NetBIOS Session Service Distributed File System
TCP Port 139 - NetBIOS Session Service Systems Management Server 2.0
TCP Port 139 - NetBIOS Session Service License Logging Service
TCP Port 143 - IMAP Exchange Server
UDP Port 161 - SNMP SNMP Service
UDP Port 162 - SNMP Traps Outbound SNMP Trap Service
TCP Port 389 - LDAP Server Local Security Authority
UDP Port 389 - LDAP Server Local Security Authority
TCP Port 389 - LDAP Server Distributed File System
UDP Port 389 - LDAP Server Distributed File System
TCP Port 443 - HTTPS HTTP SSL
TCP Port 443 - HTTPS World Wide Web Publishing Service
TCP Port 443 - HTTPS SharePoint Portal Server
TCP Port 443 - RPC over HTTP Exchange Server 2003
TCP Port 445 - SMB Fax Service
TCP Port 445 - SMB Print Spooler
TCP Port 445 - SMB Server
TCP Port 445 - SMB Remote Procedure Call Locator
TCP Port 445 - SMB Distributed File System
TCP Port 445 - SMB License Logging Service
TCP Port 445 - SMB Net Logon
TCP Port 464 - Kerberos Password V5 Net Logon
UDP Port 500 - IPsec ISAKMP Local Security Authority
TCP Port 515 - LPD TCP/IP Print Server
TCP Port 548 - File Server for Macintosh File Server for Macintosh
TCP Port 554 - RTSP Windows Media Services
TCP Port 563 - NNTP over SSL Network News Transfer Protocol
TCP Port 593 - RPC over HTTP endpoint mapper Remote Procedure Call
TCP Port 593 - RPC over HTTP Exchange Server
TCP Port 636 - LDAP SSL Local Security Authority
UDP Port 636 - LDAP SSL Local Security Authority
TCP Port 993 - IMAP over SSL Exchange Server
TCP Port 995 - POP3 over SSL Exchange Server
TCP Port 1067 - Installation Bootstrap Service Installation Bootstrap protocol server
TCP Port 1068 - Installation Bootstrap Service Installation Bootstrap protocol client
TCP Port 1270 - MOM-Encrypted Microsoft Operations Manager 2000
TCP Port 1433 - SQL over TCP Microsoft SQL Server
TCP Port 1433 - SQL over TCP MSSQL$UDDI
UDP Port 1434 - SQL Probe Microsoft SQL Server
UDP Port 1434 - SQL Probe MSSQL$UDDI
UDP Port 1645 - Legacy RADIUS Internet Authentication Service
UDP Port 1646 - Legacy RADIUS Internet Authentication Service
UDP Port 1701 - L2TP Routing and Remote Access
TCP Port 1723 - PPTP Routing and Remote Access
TCP Port 1755 - MMS Windows Media Services
UDP Port 1755 - MMS Windows Media Services
TCP Port 1801 - MSMQ Message Queuing
UDP Port 1801 - MSMQ Message Queuing
UDP Port 1812 - RADIUS Authentication Internet Authentication Service
UDP Port 1813 - RADIUS Accounting Internet Authentication Service
UDP Port 1900 - SSDP SSDP Discovery Service
TCP Port 2101 - MSMQ-DCs Message Queuing
TCP Port 2103 - MSMQ-RPC Message Queuing
TCP Port 2105 - MSMQ-RPC Message Queuing
TCP Port 2107 - MSMQ-Mgmt Message Queuing
TCP Port 2393 - OLAP Services 7.0 SQL Server: Downlevel OLAP Client Support
TCP Port 2394 - OLAP Services 7.0 SQL Server: Downlevel OLAP Client Support
UDP Port 2460 - MS Theater Windows Media Services
UDP Port 2535 - MADCAP DHCP Server
TCP Port 2701 - SMS Remote Control (control) SMS Remote Control Agent
UDP Port 2701 - SMS Remote Control (control) SMS Remote Control Agent
TCP Port 2702 - SMS Remote Control (data) SMS Remote Control Agent
UDP Port 2702 - SMS Remote Control (data) SMS Remote Control Agent
TCP Port 2703 - SMS Remote Chat SMS Remote Control Agent
UPD Port 2703 - SMS Remote Chat SMS Remote Control Agent
TCP Port 2704 - SMS Remote File Transfer SMS Remote Control Agent
UDP Port 2704 - SMS Remote File Transfer SMS Remote Control Agent
TCP Port 2725 - SQL Analysis Services SQL Analysis Server
TCP Port 2869 - UPNP Universal Plug and Play Device Host
TCP Port 2869 - SSDP event notification SSDP Discovery Service
TCP Port 3268 - Global Catalog Server Local Security Authority
TCP Port 3269 - Global Catalog Server Local Security Authority
UDP Port 3343 - Cluster Services Cluster Service
TCP Port 3389 - Terminal Services NetMeeting Remote Desktop Sharing
TCP Port 3389 - Terminal Services Terminal Services
UDP Port 3527 - MSMQ-Ping Message Queuing
UDP Port 4011 - BINL Remote Installation
UDP Port 4500 - NAT-T Local Security Authority
TCP Port 5000 - SSDP legacy event notification SSDP Discovery Service
UDP Port 5004 - RTP Windows Media Services
UDP Port 5005 - RTCP Windows Media Services
TCP Port 6001 - Information Store Exchange Server 2003
TCP Port 6002 - Directory Referral Exchange Server 2003
TCP Port 6004 - DSProxy/NSPI Exchange Server 2003
TCP Port 42424 - ASP.Net Session State ASP.NET State Service
TCP Port 51515 - MOM-Clear Microsoft Operations Manager 2000
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