Cloud9solution

Managed Firewalls & Perimeter Defense

Hardware and software firewall appliances filtering malicious traffic, botnets, and port scans.

What this is

Stateful packet filtering and web application firewalls positioned at your network boundary to block port scanning, brute force attempts, and common web attack vectors.

How it works

  1. 1Define granular port allowlists: only ports 80, 443, and secured SSH permitted.
  2. 2Deploy stateful firewall rules that inspect connection states.
  3. 3Integrate automated IP rate-limiting to throttle suspicious request floods.
  4. 4Log and analyze dropped packets for security threat intelligence.

What's included

Inspection TypeStateful packet inspection (SPI)
Rate LimitingDynamic connection throttling per source IP
Brute Force DefenseAutomated bans for repeated authentication failures
Custom RulesGeo-blocking and CIDR-based subnet restrictions

Suitability assessment

โœ“ When this makes sense

  • โ€ขWebsites receiving high volumes of malicious automated bot probes.
  • โ€ขInternal backends that should only be accessible from authorized office IP ranges.

โœ• When it doesn't

  • โ€ขCompletely isolated air-gapped systems with zero external network connectivity.
Technical details & architecture deep-diveโ–พ
nftables stateful engine operating in kernel space, filtering up to millions of packets per second with minimal CPU overhead.

Frequently asked questions

Yes. We strongly recommend and configure IP-restricted management ports so administrative interfaces are invisible to the public internet.