Service NameUDPTCP
Browsing datagram responses of NetBIOS over TCP/IP138 
Browsing requests of NetBIOS over TCP/IP137 
Client/Server Communication 135
Common Internet File System (CIFS)445139, 445
Content Replication Service 560
Cybercash Administration 8001
Cybercash Coin Gateway 8002
Cybercash Credit Gateway 8000
DCOM (SCM uses udp/tcp to dynamically assign ports for DCOM)135135
DHCP client 67
DHCP server 68
DHCP Manager 135
DNS Administration 139
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 session 139
FTP 21
FTP-data 20
HTTP 80
HTTP-Secure Sockets Layer (SSL) 443
Internet Information Services (IIS) 80
IMAP 143
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)  
IRC 531
ISPMOD (SBS 2nd tier DNS registration wizard) 1234
Kerberos de-multiplexer 2053
Kerberos klogin543
Kerberos kpasswd (v5)464464
Kerberos krb58888
Kerberos kshell 544
L2TP1701 
LDAP 389
LDAP (SSL) 636
Login Sequence137, 138139
Macintosh, File Services (AFP/IP) 548
Membership DPA 568
Membership MSN 569
Microsoft Chat client to server 6667
Microsoft Chat server to server 6665
Microsoft Message Queue Server18011801
Microsoft Message Queue Server3527135, 2101
Microsoft Message Queue Server 2103, 2105
MTA – X.400 over TCP/IP 102
NetBT datagrams138 
NetBT name lookups137 
NetBT service sessions 139
NetLogon138 
NetMeeting Audio Call Control 1731
NetMeeting H.323 call setup 1720
NetMeeting H.323 streaming RTP over UDPDynamic 
NetMeeting Internet Locator Server ILS 389
NetMeeting RTP audio streamDynamic 
NetMeeting T.120 1503
NetMeeting User Location Service 522
NetMeeting user location service ULS 522
Network Load Balancing2504 
NNTP 119
NNTP (SSL) 563
Outlook (see for ports)  
Pass Through Verification137, 138139
POP3 110
POP3 (SSL) 995
PPTP control 1723
PPTP data (see Table C.4)  
Printer sharing name lookup137 
Printer sharing session 139
Radius accounting (Routing and Remote Access)1646 or 1813 
Radius authentication (Routing and Remote Access)1645 or 1812 
Remote Install TFTP 69
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
SCM used by DCOM135135
SMTP 25
SNMP161 
SNMP Trap162 
SQL Named Pipes encryption over other protocols name lookup137 
SQL RPC encryption over other protocols name lookup137 
SQL session 139
SQL session 1433
SQL session 1024 – 5000
SQL session mapper 135
SQL TCP client name lookup5353
Telnet 23
Terminal Server 3389
UNIX Printing 515
WINS Manager 135
WINS NetBios over TCP/IP name service137 
WINS Proxy137 
WINS Registration 137
WINS Replication 42
X400 102