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Reverse Proxy Bot Shield for Small Sites
Build a SaaS plus lightweight agent that analyzes web server logs, detects spoofed crawler and scan traffic, and automatically generates blocking rules for NGINX, Caddy, and fail2ban. The strongest value is not raw threat data but fast, low-effort enforcement for operators who do not have a security team.
Why this matters
You run a site or small app stack and suddenly see bursts of suspicious requests that pretend to be well-known crawlers or AI agents. You know some are vulnerability probes, but proving that and blocking them safely takes time you do not have. Generic CDN protection helps somewhat, yet you still want control at your own reverse proxy before origin resources are wasted. The current path is messy: inspect logs manually, look up ASNs, guess which providers to block, and hope you do not lock out real visitors. A tool that turns raw logs into safe, explainable blocking rules would save hours and reduce anxiety every time a new scan wave appears.
- · Built for Indie hackers, small SaaS teams, self-hosted app operators, and sysadmins running their own reverse proxies who need better bot filtering without enterprise tooling..
- · Most likely monetization: SaaS subscription with usage tiers.
The Pain · Narrative
You run a site or small app stack and suddenly see bursts of suspicious requests that pretend to be well-known crawlers or AI agents. You know some are vulnerability probes, but proving that and blocking them safely takes time you do not have. Generic CDN protection helps somewhat, yet you still want control at your own reverse proxy before origin resources are wasted. The current path is messy: inspect logs manually, look up ASNs, guess which providers to block, and hope you do not lock out real visitors. A tool that turns raw logs into safe, explainable blocking rules would save hours and reduce anxiety every time a new scan wave appears.
Score Breakdown
Market Signal
Go-to-Market
Technical founders and solo operators managing public-facing apps on VPSs or bare servers with NGINX or Caddy.
~50K-200K active globally in the first reachable niche
Hacker News launch
$29/month
20 paying users and 100 connected servers within 30 days of launch
MVP Scope · 1–2 weeks
- Build log parser for NGINX and Caddy access logs
- Create IP enrichment pipeline using a low-cost or free ASN source
- Define simple detection rules for fake bots and common scan paths
- Generate NGINX and fail2ban blocklist outputs from detections
- Ship a minimal dashboard showing top ASNs, paths, and recommended blocks
- Add Caddy and Cloudflare rule export support
- Implement allowlist and rollback controls for blocked IP ranges
- Add confidence scoring that combines ASN type, request rate, and path patterns
- Create install docs and sample configs for three common deployment setups
- Launch onboarding flow with test-log upload and immediate rule suggestions
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1Many operators may prefer free community blocklists and occasional manual blocking instead of another subscription.
- 2False positives on VPN, privacy, or shared-network users could create support burden and reputational damage.
- 3Large security vendors may already offer adjacent features, making differentiation difficult unless onboarding is dramatically simpler.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
The discussion repeatedly focused on forged user-agents, recent scan surges, and the desire to stop suspicious traffic at the reverse proxy before it reaches origin. Several commenters discussed ASN blocking, log analysis, and the limitations of generic bot checks. Multiple solution mentions show that the need is active, but current workflows remain manual, fragmented, and error-prone.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Reverse Proxy Bot Shield for Small Sites
Sub-headline
Build a SaaS plus lightweight agent that analyzes web server logs, detects spoofed crawler and scan traffic, and automatically generates blocking rules for NGINX, Caddy, and fail2ban. The strongest value is not raw threat data but fast, low-effort enforcement for operators who do not have a security team.
Who It's For
For Indie hackers, small SaaS teams, self-hosted app operators, and sysadmins running their own reverse proxies who need better bot filtering without enterprise tooling.
Feature List
✓ Log ingestion from NGINX, Caddy, and fail2ban ✓ Spoofed bot and vuln-scan detection using ASN, path, and behavior signals ✓ One-click export of deny rules and allowlists ✓ Confidence scores and false-positive review dashboard
Where to Validate
Share your landing page in r/HN · front_page — that's exactly where these pain points were discovered.
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