Juniper’s Virtual System (VSYS) can be defined as a logical firewall, or group of logical firewalls contain in a single physical firewall. As with Checkpoint’s VSX, VSYS provides service providers and Network Operations Centers the ability to manage all of their customer’s firewalls in one appliance. Common components like administrative access, global policies, and virtual routers, can be shared across Virtual Systems while each Vsys contains its own address book entries, user lists, VPNs, policies, NATs, and services. Vsys is not as segmented as VSX with regards to Virtual Firewall configurations
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