This is a known issue with McAfee that McAfee firewalls block HP SUM traffic.
To resolve this issue, enable the port traffic associated with the HP SUM application by performing the following steps:
- From the system tray, click the McAfee icon. 
- Select Manage Features. 
- Select McAfee Host Intrusion Prevention. 
- Select the Activity Log tab. - As displayed in the following image, in the Message column, notice the entry similar to the following: - Blocked Incoming TCP from the HOST (15.255.101.110) during execution of HP SUM.
- From the menu, select Task → Unlock Interface. 
- Enter the password of the McAfee user interface. 
- Select the Firewall Policy tab. 
- On the bottom of the screen, click Add (Add new rule). 
- From the screen image, use the following settings for the new firewall rules on your system. 
- Click OK to ensure new firewall rules have been implemented. 
- Restart HP SUM. - Performing these steps allows HP SUM to function, although after a period of time (ranging from minutes to hours), McAfee disables HP SUM access. 


