I updated our extensions in ePO yesterday to the latest Feb 2021 releases so the ENS Firewall extension is now 10.7.0.843 in our ePO 5.10 Update 9 on prem solution. Today I went to update an ePO -> Firewall Catalog -> Network entry which is a list of blocked IPs. The current Network item has 64 IPs in it and I'm trying to add a 65th now. It allows me to Save the Network entry but when I click Ok on the next page that warns "The root item in the tree below is about to be saved. Changes to that item will be propagated to all the objects that contain that item. You may break dependencies to prevent change propagation." instead of then propagating the change to all the Policies using it, it instead errors saying "An unexpected error occurred." and the Network entry if you go back to it no longer has the IPs that were added to it.
I can make an all new Network entry with a single IP in it and then add that to the Rule that uses the above Network entry that keeps failing. That successfully allowed me to save out and propagate the new blocked IP. I then edited that Network item and was able to add a 2nd IP to it and save it out.
We have another system running HIPS Firewall still and it allows us to go beyond 64 entries per Network entry as I just saved the same set of IPs to it right before trying the ENS Firewall update.
Is this a bug in the new extension or a limitation in firewall Network items? If it's a limitation throwing an error after the Save is completed successfully on another screen seems rather odd.