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Essential Network Ports for Windows Services

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Service NameUDPTCP
Browsing datagram responses of NetBIOS over TCP/IP138
Browsing requests of NetBIOS over TCP/IP137
Client/Server Communication135
Common Internet File System (CIFS)445139, 445
Content Replication Service560
Cybercash Administration8001
Cybercash Coin Gateway8002
Cybercash Credit Gateway8000
DCOM (SCM uses udp/tcp to dynamically assign ports for DCOM)135135
DHCP client67
DHCP server68
DHCP Manager135
DNS Administration139
DNS client to server lookup (varies)5353
Exchange Server 5.0
   Client Server Communication   135
   Exchange Administrator   135
   IMAP   143
   IMAP (SSL)   993
   LDAP   389
   LDAP (SSL)   636
   MTA – X.400 over TCP/IP   102
   POP3   110
   POP3 (SSL)   995
   RPC   135
   SMTP   25
   NNTP   119
   NNTP (SSL)   563
File shares name lookup137
File shares session139
FTP21
FTP-data20
HTTP80
HTTP-Secure Sockets Layer (SSL)443
Internet Information Services (IIS)80
IMAP143
IMAP (SSL)993
IKE (For more information, see Table C.4)500
IPSec Authentication Header (AH) (For more information, see Table C.4)
IPSec Encapsulation Security Payload (ESP) (For more information, see Table C.4)
IRC531
ISPMOD (SBS 2nd tier DNS registration wizard)1234
Kerberos de-multiplexer2053
Kerberos klogin543
Kerberos kpasswd (v5)464464
Kerberos krb58888
Kerberos kshell544
L2TP1701
LDAP389
LDAP (SSL)636
Login Sequence137, 138139
Macintosh, File Services (AFP/IP)548
Membership DPA568
Membership MSN569
Microsoft Chat client to server6667
Microsoft Chat server to server6665
Microsoft Message Queue Server18011801
Microsoft Message Queue Server3527135, 2101
Microsoft Message Queue Server2103, 2105
MTA – X.400 over TCP/IP102
NetBT datagrams138
NetBT name lookups137
NetBT service sessions139
NetLogon138
NetMeeting Audio Call Control1731
NetMeeting H.323 call setup1720
NetMeeting H.323 streaming RTP over UDPDynamic
NetMeeting Internet Locator Server ILS389
NetMeeting RTP audio streamDynamic
NetMeeting T.1201503
NetMeeting User Location Service522
NetMeeting user location service ULS522
Network Load Balancing2504
NNTP119
NNTP (SSL)563
Outlook (see for ports)
Pass Through Verification137, 138139
POP3110
POP3 (SSL)995
PPTP control1723
PPTP data (see Table C.4)
Printer sharing name lookup137
Printer sharing session139
Radius accounting (Routing and Remote Access)1646 or 1813
Radius authentication (Routing and Remote Access)1645 or 1812
Remote Install TFTP69
RPC client fixed port session queries1500
RPC client using a fixed port session replication2500
RPC session portsDynamic
RPC user manager, service manager, port mapper135
SCM used by DCOM135135
SMTP25
SNMP161
SNMP Trap162
SQL Named Pipes encryption over other protocols name lookup137
SQL RPC encryption over other protocols name lookup137
SQL session139
SQL session1433
SQL session1024 – 5000
SQL session mapper135
SQL TCP client name lookup5353
Telnet23
Terminal Server3389
UNIX Printing515
WINS Manager135
WINS NetBios over TCP/IP name service137
WINS Proxy137
WINS Registration137
WINS Replication42
X400102