CacheGuard-OS vs Gufw

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.

Gufw is a free, GPL-3.0 graphical interface for Ubuntu’s Uncomplicated Firewall, or UFW. It lets users configure TCP and UDP port rules with Allow, Deny, Reject and Limit actions. Enabling the firewall sets incoming traffic to Deny and outgoing traffic to Allow by default, while UFW’s preconfigured programs and services simplify rule creation. Gufw is Linux software and an on-premises tool described by Ubuntu documentation as suitable for beginners. Installation uses the gufw package from the Universe repository. Gufw 14.10 or later can show a Routed option for forwarding rules when IP forwarding is configured. Version 13.10.2 or later supports remote use through an exported X display. The Ubuntu guide warns that enabling the firewall over SSH before adding an SSH rule can close the connection. No paid plans or usage limits are stated, and no multi-vendor support is listed.