Essential Network Ports for Windows Services
| Service Name | UDP | TCP |
|---|---|---|
| Browsing datagram responses of NetBIOS over TCP/IP | 138 | |
| Browsing requests of NetBIOS over TCP/IP | 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 | |
| DCOM (SCM uses udp/tcp to dynamically assign ports for DCOM) | 135 | 135 |
| DHCP client | 67 | |
| DHCP server | 68 | |
| DHCP Manager | 135 | |
| DNS Administration | 139 | |
| DNS client to server lookup (varies) | 53 | 53 |
| 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 lookup | 137 | |
| 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 klogin | 543 | |
| Kerberos kpasswd (v5) | 464 | 464 |
| Kerberos krb5 | 88 | 88 |
| Kerberos kshell | 544 | |
| L2TP | 1701 | |
| LDAP | 389 | |
| LDAP (SSL) | 636 | |
| Login Sequence | 137, 138 | 139 |
| 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 Server | 1801 | 1801 |
| Microsoft Message Queue Server | 3527 | 135, 2101 |
| Microsoft Message Queue Server | 2103, 2105 | |
| MTA – X.400 over TCP/IP | 102 | |
| 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 | |
| NetMeeting user location service ULS | 522 | |
| Network Load Balancing | 2504 | |
| NNTP | 119 | |
| NNTP (SSL) | 563 | |
| Outlook (see for ports) | ||
| Pass Through Verification | 137, 138 | 139 |
| POP3 | 110 | |
| POP3 (SSL) | 995 | |
| PPTP control | 1723 | |
| PPTP data (see Table C.4) | ||
| Printer sharing name lookup | 137 | |
| 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 DCOM | 135 | 135 |
| SMTP | 25 | |
| 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 | 53 | 53 |
| Telnet | 23 | |
| Terminal Server | 3389 | |
| UNIX Printing | 515 | |
| WINS Manager | 135 | |
| WINS NetBios over TCP/IP name service | 137 | |
| WINS Proxy | 137 | |
| WINS Registration | 137 | |
| WINS Replication | 42 | |
| X400 | 102 |
Found out about Common Internet Connectivity problems and Solutions
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