Launch Ready cyber security Checklist for founder landing page: Ready for security review in bootstrapped SaaS?.

Launch Ready cyber security Checklist for founder landing page: Ready for security review in bootstrapped SaaS?

"Ready" for a founder landing page means I can open the site, inspect the network and DNS, and not find obvious ways to leak data, hijack email, spoof the brand, or take the site down with basic abuse.

For a bootstrapped SaaS, that is not about perfection. It means the landing page is safe enough to pass a security review, support signups without exposing secrets, and survive real traffic from ads, email campaigns, and curious testers.

If I were scoring it myself, I would want:

• Zero exposed secrets in code, repo history, or client-side bundles
• HTTPS enforced everywhere with no mixed content
• SPF, DKIM, and DMARC all passing for the domain
• Cloudflare or equivalent edge protection enabled
• Redirects and subdomains locked down
• Monitoring in place so failures are seen before customers report them
• No critical auth bypasses or open admin surfaces on the public web

For a founder landing page, this is usually enough to call it security-review ready. If any one of those fails, you do not have a launch-ready asset yet. You have a public risk surface.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | HTTPS everywhere | All pages redirect to HTTPS, no mixed content | Protects trust and signup data | Browser warnings, broken forms, weak SEO | | SSL valid | Certificate valid on root and subdomains | Prevents downtime and trust loss | Site unavailable or flagged insecure | | DNS locked down | Correct A/AAAA/CNAME records, no stale entries | Stops traffic leaks and spoofing | Wrong site loads, email issues | | Redirects correct | One canonical domain only | Avoids duplicate content and phishing confusion | SEO dilution, user confusion | | Cloudflare active | WAF/DDoS protection enabled | Reduces attack noise and outages | Bot abuse, downtime under load | | Email auth passing | SPF/DKIM/DMARC pass at p=quarantine or reject | Stops domain spoofing | Phishing risk and poor inbox placement | | Secrets hidden | No API keys in frontend or repo history | Prevents account takeover and billing abuse | Leaked credentials, fraud | | Env vars isolated | Production secrets only in server env manager | Limits blast radius of leaks | Dev keys exposed in production | | Monitoring enabled | Uptime alerts within 5 minutes of failure | Cuts mean time to detect outages | Silent downtime during campaigns | | Security headers set | CSP, HSTS, X-Frame-Options or frame-ancestors present | Reduces browser-based attacks | Clickjacking, injection impact grows |

The Checks I Would Run First

1. DNS and domain ownership

Signal: The root domain resolves correctly, www redirects cleanly, and subdomains do not point at old hosts or parked services.

Tool or method: I check DNS records directly with `dig`, inspect registrar settings, and confirm Cloudflare is authoritative if that is the chosen edge layer.

Fix path: Remove stale A/CNAME records, set one canonical host, add 301 redirects from all variants to the preferred domain, and verify ownership in Search Console and Cloudflare.

2. TLS and HTTPS behavior

Signal: The browser shows a valid certificate chain on every public entry point. There are no mixed-content warnings from images, scripts, fonts, or embedded widgets.

Tool or method: I use Chrome DevTools Security tab plus `curl -I` against root domain and subdomains. I also run an SSL check to catch chain issues that hide behind local testing.

Fix path: Install a valid cert on all active hosts through Cloudflare or your platform provider. Force HTTPS at the edge and replace any hardcoded `http://` asset URLs.

3. Secrets exposure review

Signal: No API keys are visible in source maps, frontend bundles, Git history snippets shared publicly, build logs, or environment files committed by mistake.

Tool or method: I scan the repo for common secret patterns using tools like Gitleaks or TruffleHog. Then I inspect built assets because many founders only check source code and miss compiled leaks.

Fix path: Rotate any exposed key immediately. Move secrets to server-side environment variables only. If a key must exist in client code at all, assume it is public and redesign around that assumption.

4. Email authentication for the domain

Signal: SPF authorizes only approved senders. DKIM signs messages correctly. DMARC is configured so spoofed mail gets quarantined or rejected instead of delivered.

Tool or method: I use MXToolbox plus direct header checks from test emails sent to Gmail and Outlook.

Fix path: Publish one SPF record only. Enable DKIM signing at your email provider. Start DMARC at `p=quarantine`, then move to `p=reject` after you confirm legitimate mail passes consistently.

v=DMARC1; p=quarantine; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s

5. Public attack surface review

Signal: There are no hidden admin paths such as `/admin`, `/api/internal`, staging URLs, preview deployments with production data access, or debug endpoints exposed publicly.

Tool or method: I crawl routes manually and with a lightweight scanner like OWASP ZAP in passive mode. I also inspect robots.txt because founders often confuse "hidden" with "secure".

Fix path: Remove unused routes from production builds. Put admin tools behind authentication plus IP allowlists if needed. Block staging environments from indexing and from production data access.

6. Edge protection and monitoring

Signal: Cloudflare WAF is on where appropriate. Rate limiting exists for signup forms and contact forms. Uptime monitoring alerts fire before customers notice downtime.

Tool or method: I test form abuse manually with repeated submissions and confirm monitoring through UptimeRobot or Better Stack alert delivery.

Fix path: Enable bot mitigation rules where they will not block legitimate signups. Add rate limits to form endpoints. Set alerts for DNS failure, TLS expiry risk, 5xx spikes, and homepage downtime.

Red Flags That Need a Senior Engineer

1. You have exposed secrets already. If an API key was pushed to GitHub once or appears in frontend code today, DIY cleanup is usually too slow and too risky without rotation discipline.

2. Your landing page talks to production APIs directly from the browser. That often means weak auth boundaries, over-permissive CORS rules, or leaked write access that can be abused by anyone with DevTools open.

3. You have multiple domains pointing at different versions of the brand. This creates phishing confusion fast. It also breaks email trust if users cannot tell which domain is real.

4. You are running ads but have no monitoring. If you pay for traffic before uptime alerts exist, you can burn spend for hours while forms fail silently.

5. You need app store-grade trust even though this is "just" a landing page. If investors, enterprise buyers, or security-conscious users will inspect you closely later on then weak headers, email auth gaps, and sloppy deployment hygiene become sales blockers rather than technical details.

DIY Fixes You Can Do Today

1. Turn on HTTPS enforcement. Make sure every version of your site redirects to one canonical HTTPS URL with a single hostname choice such as `www` or root domain.

2. Audit your repository for secrets. Search `.env`, build logs, Git history, and deployment settings for API keys, webhooks, and private tokens. Rotate anything suspicious immediately.

3. Check SPF, DKIM, and DMARC. Send a test email to Gmail, open the raw headers, and confirm all three pass. If DMARC is missing, add it now before sending any outbound campaign mail from the new domain.

4. Remove unused public routes. Delete old preview links, staging subdomains, debug pages, and forgotten admin paths that do not belong on production internet traffic.

5. Add basic uptime monitoring today. Even a simple 5-minute ping check is better than nothing. Set alerting by email plus Slack so an outage does not sit unnoticed during launch day.

Where Cyprian Takes Over

When these checks fail together, the work stops being "small fixes" and becomes launch infrastructure cleanup.

Here is how I map failures to deliverables:

| Failure area | What I do in Launch Ready | |---|---| | Domain mismatch / bad redirects | DNS cleanup, canonical redirects, subdomain mapping | | SSL problems / mixed content | Certificate setup, HTTPS enforcement, asset fixes | | Weak edge protection / bot abuse risk | Cloudflare setup, DDoS protection, caching rules | | Email spoofing risk | SPF/DKIM/DMARC configuration | | Secret exposure risk | Environment variable audit, secret removal guidance, production-safe deployment review | | Silent downtime risk | Uptime monitoring setup, handover checklist |

Typical timeline:

• Hour 0-8: audit DNS,

TLS, email auth, deployment surfaces

• Hour 8-24: fix redirects,

Cloudflare, headers, secret handling

• Hour 24-36: validate production deployment,

monitoring, and form behavior

• Hour 36-48: retest everything,

document handover steps, and give you a clean launch checklist

support noise,

and damaged sender reputation.

If you want me to handle this end-to-end instead of piecing it together yourself,

Launch Ready covers domain,

email,

Cloudflare,

SSL,

deployment,

secrets,

It is built for founders who need a security-review-ready landing page without turning launch week into an engineering project.

References

• roadmap.sh Code Review Best Practices: https://roadmap.sh/code-review-best-practices
• roadmap.sh API Security Best Practices: https://roadmap.sh/api-security-best-practices
• roadmap.sh Cyber Security: https://roadmap.sh/cyber-security
• OWASP Cheat Sheet Series: https://cheatsheetseries.owasp.org/
• Cloudflare Learning Center: https://www.cloudflare.com/learning/

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*