Client Push Installation fails in ConfigMgr 2012

Today I activated Client Push Installation in ConfigMgr 2012 in a existing environment. When looking in CMM.log there was no installation activity seen at all. Looking in the environment I found the following:

Looking at Client Push Installation settings, all was okay. The Client Push Installation account was configured (with Admin permissions), and Installation properties were set.

Ports needed for Client Push Installation were not set in the local Firewall settings published by Group Policy.

By default the following is needed:
-File and Printer Sharing
-Windows Management Instrumentation (WMI)

For Client Push Installation the following is needed also:
-RPC endpoint mapper – TCP 135
-RPC endpoint mapper – UDP 135
-Server Message Block (SMB) – TCP 445

"Use this boundary group for site assignment" was not set on the boundary group. This must be activated to make usage of Client Push Installation.

After making this changes everything went fine again! Looking in CCM.log installation activity was seen for all systems.