port 80 vCenter Server requires port 80 for direct HTTP connections. Port 80 redirects requests to HTTPS port443. This is useful if you accidentally use http://server instead of https://server . port 389 This port must be open on the local and all remote instances of vCenter Server. This is the LDAP portnumber for the Directory Services for the vCenter Server group. The vCenter Server system needs tobind to port 389, even if you are not joining this vCenter Server instance to a Linked Mode group. Ifanother service is running on this port, it might be preferable to remove it or change its port to differentport. If needed, you can run the LDAP service on any port from 1025 through 65535.If this instance is serving as the Microsoft Windows Active Directory, change the port number from 389to an available port from 1025 through 65535. port 443 The default port that the vCenter Server system uses to listen for connections from the vSphere Client.To enable the vCenter Server system