Network Ports used by Active Directory
Network Ports used by Active Directory -
The normal functioning of Active Directory involves the use of the following network ports -
| # |
Application . |
Protocol . |
Port . |
1 |
Lightweight Directory Access Protocol (LDAP) |
TCP, UDP |
389 |
2 |
LDAP over SSL |
TCP |
636 |
3 |
Global Catalog |
TCP |
3268 |
4 |
Global Catalog over SSL |
TCP |
3269 |
5 |
Kerberos |
UDP, TCP |
88 |
6 |
Kerberos Password v5 |
UDP, TCP |
464 |
7 |
LSA |
TCP |
636 |
8 |
DC Locator |
UDP |
389 |
9 |
Net Logon |
TCP |
445 |
10 |
DFS Replication |
TCP |
389 |
11 |
Remote Procedure Call (RPC) |
TCP |
135 |
12 |
RPC over HTTPS |
TCP |
593 |
13 |
Server Message Block (SMB) |
TCP |
445 |
14 |
IPSec ISAKMP |
TCP |
500 |
15 |
Active Directory Web Services |
TCP |
9389 |
16 |
Active Directory Management Gateway Service |
TCP |
9389 |
17 |
Windows Time Service (NTP, SNTP) |
UDP |
123 |
18 |
DNS |
UDP, TCP |
53 |
19 |
SMTP (; Support for inter-site replication) |
TCP |
25 |
+ |
RPC randomly allocated high TCP ports |
UDP |
49152 - 65535 |