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CacheGuard provides a firewall, an antivirus, a forwarding and reverse proxy cache, a web traffic compressor, a URL guarding facility, a Web application load balancer, a WAF (Web Application Firewall), a traffic shaper, a traffic logger and much more. Integrating CacheGuard into your networks is completely transparent for end users and Web applications. At the heart of CacheGuard there is CacheGuard-OS. To install CacheGuard-OS you need a dedicated hardware or virtual machine. Almost all hardware and virtualization systems in the market such as Dell, HP, IBM, VMware, Hyper-V, Proxmox Linux KVM and VirtualBox are supported. CacheGuard-OS is based on a hardened Linux system built from scratch (with LFS) and integrates Netfilter, IProute2, Squid, SquidGuard, Apache, modSecurity, ClamAV and many other open source technologies interfaced together as a whole to allow an easy and straightforward configuration process using a CLI (Command Line Interface) and a Web GUI.