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TCP and UDP Ports
This user guide applies for both Nodinite LDAP products: BizTalk LDAP Adapter and LDAP Web API and describes the common ports used for LDAP communication
Working with LDAP most probably involves multiple clients and servers. These can run on different operating systems and be scattered on different networks (that can be segmented in various ways). Below is a list of ports that are common for LDAP.
| Port Number | Port Name | Description | Comment | |
|---|---|---|---|---|
| 53 | DNS | |||
| 88 | Kerberos | |||
| 135 | RPC | Also used for DTC | ||
| 139 | NetBios-SSN | |||
| 389 | Active Directory, OpenLDAP, Fedora, Sun, NIS, ... | Default port | ||
| 443 | HTTPS | Should be used for the LDAP Web API | ||
| 445 | SMB (V2, V3) | Optional usage with SeriLog file appender | ||
| 445 | msft-ds | IPsec ISAKMP | ||
| 500 or 4500 | IPsec ISAKMP | ISAKMP uses UDP as its transport protocol. ISAKMP traffic normally goes over UDP port 500 | IF NAT-T is used UDP port 4500 is used | |
| 636 | SSL/LDAPS | |||
| 1389 | OpenDS | |||
| 3268, 3269 | Global Catalog DCs | |||
| 3269 | Global Category List | |||
| 1024-5000 49152-65535 |
RPC randomly allocated high TCP ports | |||
| 10389 | Apache Directory Server |
Ports marked with the icon are very common and can be considered required and must be allowed in your firewall(s)
You can view the dynamic port range using the following netsh commands: from KB article 832017
- netsh int ipv4 show dynamicport tcp
- netsh int ipv4 show dynamicport udp
- netsh int ipv6 show dynamicport tcp
- netsh int ipv6 show dynamicport udp