ManageEngine Firewall Analyzer

Firewall Analyzer is agentless log analytics and configuration management for network security devices, and it is the most accessible product in this category by some distance. Where the enterprise platforms here are demo-gated and quoted, this can be downloaded and trialled directly, which suits teams that want to see value against their own logs before starting a procurement process.

It is explicitly vendor-agnostic, supporting almost all open-source and commercial firewalls, and its scope extends past firewalls to VPNs, proxy servers, IDS and IPS. Coverage spans log analysis, policy and rule analysis, change management and security audit, with bandwidth usage treated as a first-class concern alongside security. That bandwidth angle is unusual: the stated problem is that firewalls generate enormous traffic logs and administrators need to understand how bandwidth is actually consumed, not only whether policy is correct.