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[EOL/EOE] Uses for the "Install On" column in NSM Policy Manager



Article ID: KB12206 KB Last Updated: 18 Mar 2021Version: 5.0

Note: A product listed in this article has either reached hardware End of Life (EOL) OR software End of Engineering (EOE).  Refer to End of Life Products & Milestones for the EOL, EOE, and End of Support (EOS) dates.

The column "Install On" is available in the NSM Policy Manager.   It controls which devices a particular rule within a policy will be installed on.



Incorrect use of this feature can cause unexpected results.

These results include:

  • Improper installation of a rule on a firewall for which it is not intended.
  • Not installing a rule on a firewall for which it was intended

In NSM Policy Manager:

  • A single firewall device or cluster can only have one policy assigned to it.
  • One policy can be assigned to multiple devices.
  • Individual rules within a policy can be assigned to one, two, three or more devices or ANY device to which the policy is assigned.

The example below helps illustrate the meaning of this.

In the screen capture below, we see that the policy "ssg5on51.138" is assigned to 2 devices, Device1 and Device2.  We also see that the policy "StaticIDP-47.21" is assigned to only one device, Device 3:

Policy Assignments

This is an illustration that a single policy can be assigned to more than one device.

NSM will not allow the assignment of more than one policy to a device.  Assignment of a policy to a device by any method in NSM will "unassign" whatever policy was previously assigned to the device. In the screen capture below, we see the rules within the policy "ssg5on51.138":

Policy and Rules

As shown, the policy contains 4 rules.  Each of the rules is assigned to one or more devices.


  • Rule 1 will be updated to Device1 and Device2.
  • Rule 2 will be updated only to Device2
  • Rule 3 will be updated only to Device1
  • Rule 4 will not be updated to any device.
    This is because, as seen above, the policy is not assigned to Device3. Thus, when Device1 or Device2 is updated, Rule 4 will not be updated to those devices.

One common mistake which is made is that if "Install On" is used in all of the policies and someone copies and pastes a rule from one policy to another, the "Install On" will be maintained from the original.  This will result in the need to change the "Install On" column after the rule is pasted into the new policy.

Modification History:
2020-10-18: Article marked as EOL/EOE.
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