Port Assignments for Commonly Used Services

There are many services associated with the Microsoft® Windows® 2000 operating system. These services may require more than one Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port for the service to be functional. The following table shows the default ports that each service uses.

Service Name

UDP

TCP

Browsing datagram responses of NetBIOS over TCP/IP (NetBT)

138

Browsing requests of NetBT

137

Client/Server Communication

135

Common Internet File System (CIFS)

445

139, 445

Content Replication Service

560

Cybercash Administration

8001

Cybercash Coin Gateway

8002

Cybercash Credit Gateway

8000

Distributed Component Object Model (DCOM) (SCM uses UDP/TCP to dynamically assign ports for DCOM)

135

Domain Name System (DNS) client to server lookup (varies)

DNS Administration

139

Dynamic Host Configuration Protocol (DHCP) client

DHCP Manager

135

DHCP server

Exchange Administrator

135

Exchange Server 5.0

File shares name lookup

137

File shares session

139

File Transfer Protocol (FTP)

FTP-data

Hypertext Transfer Protocol (HTTP)

HTTP-Secure Sockets Layer (SSL)

443

Internet Information Services (IIS)

Internet Key Exchange (IKE)

500

Internet Message Access Protocol (IMAP)

143

IMAP (SSL)

993

Internet Protocol Security (IPSec) Authentication Header (AH)

IPSec Encapsulating Security Payload (ESP)

Internet Relay Chat (IRC)

531

ISPMOD (SBS 2nd tier DNS registration wizard)

1234

Kerberos de-multiplexer

2053

Kerberos klogin

543

Kerberos kpasswd (v5)

464

(continued)

Service Name

UDP

TCP

Kerberos krb5

Kerberos kshell

544

Layer Two Tunneling Protocol (L2TP)

1701

Lightweight Directory Access Protocol (LDAP)

389

LDAP (SSL)

636

137, 138

139

Macintosh, File Services (AFP/IP)

548

Membership DPA

568

Membership MSN

569

Message transfer agent (MTA) - X.400 over TCP/IP

102

Microsoft Chat client to server

6667

Microsoft Chat server to server

6665

Microsoft Message Queue Server

1801

Microsoft Message Queue Server

3527

135, 2101

Microsoft Message Queue Server

2103, 2105

NetBT datagrams

138

NetBT name lookups

137

NetBT service sessions

139

NetLogon

138

NetMeeting Audio Call Control

1731

NetMeeting H.323 call setup

1720

NetMeeting H.323 streaming RTP over UDP

Dynamic

NetMeeting Internet Locator Server (ILS)

389

NetMeeting RTP audio stream

Dynamic

NetMeeting T.120

1503

NetMeeting User Location Service

522

Network Load Balancing

2504

Network News Transport Protocol (NNTP)

119

NNTP (SSL)

563

Outlook (see for ports)

Pass Through Verification

137, 138

139

Point-to-Point Tunneling Protocol (PPTP) control

1723

PPTP data

Post Office Protocol version 3 (POP3)

110

POP3 (SSL)

995

Printer sharing name lookup

137

Printer sharing session

139

(continued)

Service Name

UDP

TCP

Remote Authentication Dial-In User Service (RADIUS) authentication (Routing and Remote Access)

1645 or 1812

RADIUS accounting (Routing and Remote Access)

1646 or 1813

Remote Install TFTP

Remote procedure call (RPC)

135

RPC client fixed port session queries

1500

RPC client using a fixed port session replication

2500

RPC session ports

Dynamic

RPC user manager, service manager, port mapper

135

Service Control Manager (SCM) used by DCOM

135

Simple Mail Transfer Protocol (SMTP)

Simple Network Management Protocol (SNMP)

161

SNMP Trap

162

SQL Named Pipes encryption over other protocols name lookup

137

SQL RPC encryption over other protocols name lookup

137

SQL session

139

SQL session

1433

SQL session

1024 - 5000

SQL session mapper

135

SQL TCP client name lookup

Telnet

Terminal Services

3389

UNIX Printing

515

Windows Internet Name Service (WINS) Manager

135

WINS NetBT name service

137

WINS Proxy

137

WINS Registration

137

WINS Replication

X400

102