The command open_firewall does not work

Symptom

The CLI command open_firewall does not work on some nodes.

Cause

HP SUM is unable to open the firewall in all instances. These include: third-party firewall applications, Linux iptables DROP entries, and firewalls with complex rules.

Action

When the open_firewall command does not work, manually open the firewall and then HP SUM can manage the node.