Created On 09/25/18 17:27 PM - Last Modified 07/29/19 17:51 PM
When creating a new LDAP server profile inside of the WebGUI Device > Server Profiles > LDAP. The option to use SSL is enabled by default. Enabling or disabling SSL encryption will change the TCP port that is used for the communication between the firewall and the LDAP server.
Clear text LDAP authentication (SSL option disabled) will happen on TCP port 389.
With SSL enabled, communication to the LDAP server will use TCP port 636 instead.
It is important to consider the port being used when configuring LDAP authentication to make sure the server is listening on the same port.