The cSRX is a containerized version of the SRX Series device that runs on Linux platforms. The cSRX has the following benefits for deploying in a virtual environment:
The cSRX supports Layer 2 and Layer 3 deployments, which means it can operate as a transparent or a routed firewall. The cSRX can also support multiple routing instances and virtual routers2
The cSRX supports firewall, NAT, IPS, and UTM services, which means it can provide comprehensive security features for protecting the virtual network. The cSRX can also support application identification, user firewall, and VPN services2
The cSRX default configuration does not contain three default zones: trust, untrust, and management. The cSRX default configuration contains only one zone: junos-host. The cSRX does not have low memory requirements. The cSRX requires at least 2 GB of memory and 2 CPU cores to run2 References:
1: Juniper Security Specialist (JNCIS-SEC) (JN0-334) | Study Guide 3
2: Junos OS Security Configuration Guide | cSRX Overview 4
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