CacheGuard-OS vs Google Cloud Firewall Policies

CacheGuard-OS turns an x86 or x64 machine into a Linux network appliance for securing and optimizing network traffic. Its combined functions include firewalling, IPsec VPN, web application security, content caching, antivirus inspection and traffic shaping. Install it on bare metal or as a virtual machine, including VMware, Hyper-V and Proxmox. Administrators can configure an appliance through a CLI or browser-based Web GUI; a Manager can centrally manage multiple Gateways. The firewall uses stateful packet filtering, NAT and PAT, and the maker says it blocks common attacks such as DoS, SYN flood and IP spoofing by default. URL filtering supports lists and regular expressions, with LDAP or AD/Kerberos authentication. The WAF offers generic and custom filters, IP reputation lists and antivirus scanning. WAN tools include HTTP compression and multi-WAN routing with automatic failover. The OS is free to use. Optional subscriptions cover URL blacklists and extended antivirus signatures; Standard and Premium support also require paid subscriptions.

Google Cloud Firewall Policies provide hierarchical firewall rules for organizations that need to apply controls across an organization or selected folders. Rules can allow or deny connections, or pass evaluation onward to lower-level policies or VPC firewall rules. A hierarchical policy becomes active only when associated with an organization or folder; it cannot be assigned directly to a project. Rules can target VPC networks and VM service accounts, but not instance tags. When configured with a security profile group, matching traffic can be sent through a firewall endpoint for Layer 7 inspection, including URL filtering and intrusion detection and prevention. Administrators can manage policies in the Google Cloud console or with gcloud CLI; Google also documents Terraform support for rules with logging enabled. Logs are available in Cloud Logging and can be exported to its supported destinations. Identity and Access Management roles govern policy permissions. Essentials rules based on standard network attributes are free; hierarchical policy charges are listed per covered VM and depend on rule-attribute count.