List of Ports used by Exchange Server
Please find the list of Ports used by Exchange Server:
Ports used by Exchange Server
Protocol |
Port |
Description |
SMTP |
TCP: 25 |
The SMTP service uses TCP port 25. |
DNS |
TCP/UDP: 53 |
DNS listens on port 53. Domain controllers use this port. |
LSA |
TCP: 691 |
The Microsoft Exchange Routing Engine service (RESvc) listens for routing link state information on this port. |
LDAP |
TCP/UPD: 389 |
Lightweight directory access protocol (LDAP) used by Microsoft Active Directory® directory service, Active Directory Connector, and the Microsoft Exchange Server 5.5 directory use this port. |
LDAP/SSL |
TCP/UDP: 636 |
LDAP over Secure Sockets Layer (SSL) uses this port. |
LDAP |
TCP/UDP: 379 |
The Site Replication Service (SRS) uses this port. |
LDAP |
TCP/UDP: 390 |
This is the recommended alternate port to configure the Exchange Server 5.5 LDAP protocol when Exchange Server 5.5 is running on an Active Directory domain controller. |
LDAP |
TCP: 3268 |
Global catalog. The Windows 2000 and Windows Server 2003 Active Directory global catalog (a domain controller "role") listens on TCP port 3268. |
LDAP/SSLPort |
TCP: 3269 |
Global catalog over SSL. Applications that connect to TCP port 3269 of a global catalog server can transmit and receive SSL encrypted data. |
IMAP4 |
TCP: 143 |
Internet Message Access Protocol (IMAP) uses this port. |
IMAP4/SSL |
TCP: 993 |
IMAP4 over SSL uses this port. |
POP3 |
TCP: 110 |
Post Office Protocol version 3 (POP3) uses this port. |
POP3/SSL |
TCP: 995 |
POP3 over SSL uses this port. |
NNTP |
TCP: 119 |
Network News Transfer Protocol (NNTP) uses this port. |
NNTP/SSL |
TCP: 563 |
NNTP over SSL uses this port. |
HTTP |
TCP: 80 |
HTTP uses this port. |
HTTP/SSL |
TCP: 443 |
HTTP over SSL uses this port. |