Launch Ready cyber security Checklist for founder landing page: Ready for handover to a small team in marketplace products?.

What "ready" means for a founder landing page

For a marketplace product, "launch ready" means a stranger can land on the page, trust it, submit a form, and not expose your domain, email, or customer data to avoidable risk. It also means a small team can take over without breaking DNS, redirects, SSL, tracking, or inbox delivery.

If I were assessing this for handover, I would want four things true at the same time:

• The page loads fast enough to convert. Target: LCP under 2.5s on mobile.
• The public surface is locked down. Target: zero exposed secrets, no critical auth bypasses, no open admin paths.
• Email actually lands in inboxes. Target: SPF, DKIM, and DMARC all passing.
• A small team can operate it without me. That means documented DNS, deployment, environment variables, monitoring, and rollback steps.

If any of those are missing, the page is not ready for handover. It might look finished in the browser, but it is still fragile in production.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | | --- | --- | --- | --- | | Domain ownership | Registrar access is controlled by the founder or team | Prevents lockout and hijack risk | Lost domain access, downtime | | DNS setup | A and CNAME records are documented and correct | Routes traffic to the right app | Site does not resolve or points to old host | | SSL active | HTTPS works with valid certs on all main URLs | Protects trust and form submissions | Browser warnings, lower conversions | | Redirects correct | www/non-www and old URLs redirect cleanly | Preserves SEO and user flow | Duplicate content, broken links | | Email authentication | SPF/DKIM/DMARC pass | Improves inbox delivery and brand trust | Emails go to spam or fail entirely | | Secrets hidden | No API keys in code or client bundle | Prevents abuse and account compromise | Data leaks, billing abuse | | Cloudflare configured | WAF/CDN/DDoS protection enabled where needed | Reduces attacks and load spikes | Outages under traffic or bot pressure | | Uptime monitoring | Alerts exist for homepage and form flow | Detects downtime before users do | Silent failures and lost leads | | Deployment path documented | Team knows how to deploy and rollback | Reduces release mistakes after handover | Broken launches and support load | | Handover checklist complete | Ownership list covers domains, email, analytics, hosting | Makes team takeover real, not theoretical | Dependency on one person |

The Checks I Would Run First

1. Domain and DNS ownership

Signal: I can confirm who owns the registrar account, who controls DNS, and whether there are any stale records pointing to old environments.

Tool or method: Registrar login review, DNS zone export, `dig`, `nslookup`, Cloudflare dashboard check.

Fix path: Move DNS into one controlled account if needed. Remove unused records. Document every live record with purpose, TTL, and owner.

2. SSL and redirect integrity

Signal: All public variants resolve correctly: apex domain, www subdomain if used, old campaign URLs if they exist. No mixed content warnings.

Tool or method: Browser dev tools, SSL Labs test, curl checks for 301/302 behavior.

Fix path: Force HTTPS at the edge. Choose one canonical host. Redirect everything else to it. If cert renewal is manual anywhere in the stack, replace that process before handover.

3. Email deliverability setup

Signal: SPF includes only approved senders. DKIM signs outbound mail. DMARC is present with reporting enabled.

Tool or method: MXToolbox or similar lookup tools plus a test send from your contact form provider.

Fix path: Tighten SPF to approved services only. Turn on DKIM for every sender. Start DMARC at `p=none`, then move to `quarantine` once reports are clean.

Example: ```txt v=DMARC1; p=none; rua=mailto:dmarc@yourdomain.com; adkim=s; aspf=s ```

4. Secrets exposure review

Signal: No API keys appear in source control history, frontend bundles, build logs, or pasted environment files.

Tool or method: GitHub secret scan if available, ripgrep across repo history where possible, browser bundle inspection, environment variable audit.

Fix path: Rotate anything exposed immediately. Move secrets server-side only. Split public config from private credentials so the frontend never receives keys that can be abused.

5. Monitoring of homepage and lead capture flow

Signal: You get an alert when the site is down or when form submissions fail.

Tool or method: UptimeRobot, Better Stack, StatusCake, or Cloudflare monitoring plus a synthetic check on the form endpoint.

Fix path: Monitor both page availability and conversion path health. A homepage that loads but drops form submissions is still a failure.

6. Cloudflare edge protection

Signal: CDN caching is active where safe. DDoS protection is enabled. WAF rules do not block real users but do stop obvious junk traffic.

Tool or method: Cloudflare dashboard review plus a test from mobile network and desktop browser.

Fix path: Cache static assets only unless you know what you are doing. Add rate limits on contact forms if spam becomes a problem. Keep challenge pages away from core conversion paths unless abuse forces them.

Red Flags That Need a Senior Engineer

1. You do not know where DNS lives.

That usually means nobody truly owns production yet. One wrong change can take the site offline for hours while traffic keeps going to dead records.

2. Secrets were ever committed to GitHub.

Even if they were deleted later, assume they may already be copied by bots or indexed in logs. This is not a cosmetic issue; it is an account compromise risk.

3. The contact form sends mail through a personal inbox SMTP setup.

This often breaks at scale and makes deliverability unpredictable. For marketplace products that depend on trust emails and lead capture, that becomes lost revenue fast.

4. There is no rollback plan.

If deployment fails during handover night or after a marketing push starts driving traffic again later this week), you need a way back in minutes not hours.

5. The app uses hidden assumptions instead of documented config.

If one person "just knows" which env vars matter or which subdomain points where", the team will spend support time rediscovering basics instead of shipping features.

DIY Fixes You Can Do Today

1. List every domain asset in one document.

Write down registrar login owner,, DNS provider,, primary domain,, subdomains,, email provider,, hosting platform,, analytics tool,, and form provider.. If you cannot list it all from memory,, you are already at handover risk..

2.. Turn on 2FA everywhere..

Start with registrar,, email,, Cloudflare,, GitHub,, hosting,,and analytics.. A stolen password should not be enough to hijack your launch..

3.. Remove obvious secrets from code..

Search for API keys,, private tokens,, webhook secrets,,and service credentials.. If something looks sensitive,,, rotate it after removal rather than assuming deletion was enough..

4.. Test your own email deliverability..

Submit the form using three addresses:, Gmail,,, Outlook,,,and one company mailbox.. If messages land in spam or fail silently,,, fix SPF/DKIM/DMARC before you add paid traffic..

5.. Create one simple rollback note..

Write:, "If deployment fails,,, restore previous build,,, revert DNS only if required,,, verify homepage,,, verify form submit,,, confirm alerts." That tiny note saves teams from panic during release windows..

Where Cyprian Takes Over

If these checks fail,,,, Launch Ready covers the exact pieces that usually block handover:

• Domain
• Ownership review
• DNS cleanup
• Redirect mapping
• Subdomain setup
• Timeline: first few hours of the 48-hour sprint

• Email
• SPF/DKIM/DMARC setup
• Sender alignment
• Inbox delivery verification
• Timeline: same day as DNS work

• Edge security
• Cloudflare setup
• SSL enforcement
• Caching rules
• DDoS protection
• Timeline: within day one unless infrastructure access is blocked

• Production deployment
• Environment variables
• Secret handling
• Build validation
• Release verification
• Timeline: day one to day two depending on platform access

• Monitoring and handover
• Uptime monitoring
• Alert routing
• Handover checklist
• Team notes for future changes
• Timeline: final hours before delivery

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 Roadmap: https://roadmap.sh/cyber-security
• Cloudflare Docs on DNS and SSL/TLS: https://developers.cloudflare.com/
• Google Workspace Help on SPF,DKIM,and DMARC basics: https://support.google.com/a/topic/2752442

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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.*