SCCM 2012 Client Push fail with error code 0x800706ba

CWmi::Connect(): ConnectServer(Namespace) failed. – 0x800706ba

This error is  because the SCCM Client uses Dynamic RPC connections for WMI (the DCOM RPC uses callback for the event receipt which chooses random ports 1024-65534.)

Description

UDP

TCP

Server Message Block (SMB) between the site server and client computer.

 

445

RPC endpoint mapper between the site server and the client computer.

 

135

135

RPC dynamic ports between the site server and the client computer.

 

DYNAMIC

Hypertext Transfer Protocol (HTTP) from the client computer to a management point when the connection is over HTTP.

 

80

 

Secure Hypertext Transfer Protocol (HTTPS) from the client computer to a management point when the connection is over HTTPS.

443

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