first I try to give you some information. Our headquarter is located in Germany. All of our subsidiaries are connected to Germany via relatively slow VPN lines. Overall we have round about 20 DCs in different countires. Until now we have only 3 Palo Alto firewalls (Germany, USA, Canada) but in the future we plan to buy more.
Our setup until last week was the following. We installed the software User-ID agent on the DC in Germany. We connected all DCs worldwide to this agent. Unfortunately the agent retrieves all logs and produces a lot of traffic over the VPN lines. So we decided to change our setup.
We are planning to install the User-ID agent on all DCs worldwide and connect the firewall in Germany with all agents. With this solution the traffic should drop significantely. Furthermore the firewall in USA and Canada will be connected with the particular DC in that country and in Germany.
Or is it better to connect these firewalls also with all agents?
Is it possible to distribute the mappings from the firewall in Germany to the other firewalls without the need of connecting agents to the firewalls in USA and Canada?
Another question is if all agents should observe all available networks or only the local subnets?
I hope you can help me!
Per PanOS 4.1 and 5.0, 2050 supports 100 User ID agents.
Though it can support so many agents I would suggest the efficiency of the hardware with user id agents depends on the frequency of the data being retrieved from the agents to the firewall and how much data is being obtained. To some extent we can change the frequency values on the user id agents to retrieve user-ip mapping.
Hope this answers your question !
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