Launch Ready cyber security Checklist for founder landing page: Ready for scaling past prototype traffic in B2B service businesses?.

What "ready" means for a founder landing page

For a B2B service business, "ready" does not mean the page just loads and looks good in your browser. It means the page can handle real traffic, protect customer trust, and keep working when ads, referrals, or outbound campaigns start sending strangers to it.

For this product and outcome, I would call it ready only if all of these are true:

• The domain resolves correctly with no broken redirects or mixed content.
• SSL is valid everywhere, including apex domain and subdomains.
• Cloudflare is in front of the site with caching and DDoS protection turned on.
• SPF, DKIM, and DMARC pass so your outbound email does not land in spam.
• No secrets are exposed in frontend code, logs, or public repos.
• Uptime monitoring is live and alerts go to a real person.
• The page loads fast enough for paid traffic: LCP under 2.5s on mobile, ideally under 2.0s.
• Forms and lead capture do not leak data or allow spam floods.
• Deployment is repeatable, documented, and reversible.
• If something breaks at 2 am, you know who gets paged and what gets rolled back.

If any of those are missing, the page is still a prototype. That is fine for internal testing. It is not fine for scaling past prototype traffic in a B2B service business where every broken form, email failure, or downtime minute turns into lost leads and wasted ad spend.

Quick Scorecard

| Check | Pass criteria | Why it matters | What breaks if it fails | |---|---|---|---| | Domain + DNS | Apex and www resolve correctly; redirects are single-hop | Trust and SEO | Broken links, duplicate content, lost leads | | SSL | Valid cert on all public hosts; no mixed content | Security and browser trust | Browser warnings, blocked forms | | Cloudflare | Proxy enabled; WAF/DDoS/caching on | Protects against spikes and attacks | Slowdowns, outages, bot abuse | | Email auth | SPF, DKIM, DMARC all pass | Deliverability | Sales emails hit spam or get rejected | | Secrets handling | Zero secrets in frontend or repo history | Prevents compromise | API abuse, leaked keys, billing loss | | Lead forms | Server-side validation + rate limits + anti-spam | Stops junk and abuse | Spam floods, bad data, support load | | Monitoring | Uptime checks + alerting set up | Fast incident response | You find outages from customers first | | Backups/rollback | Known rollback path within 15 minutes | Reduces deployment risk | Long downtime after a bad release | | Performance | Mobile LCP under 2.5s; CLS below 0.1 | Conversion and SEO | Bounce rate rises, ad spend wasted | | Logging/privacy | No sensitive data in logs; least privilege access | Data safety | Exposure of customer info or credentials |

The Checks I Would Run First

1. Domain and redirect chain

Signal: The root domain resolves instantly to the intended site with one clean redirect at most. I also check that www and non-www do not split traffic or create loops.

Tool or method: `curl -I`, DNS lookup tools, Cloudflare dashboard.

Fix path: Set one canonical host, force HTTPS once only, remove chained redirects, and make sure every subdomain has an explicit purpose.

2. SSL coverage and mixed content

Signal: Every public endpoint shows a valid certificate with no browser warnings. There should be zero mixed-content requests from HTTPS pages loading HTTP assets.

Tool or method: Browser dev tools, SSL Labs test, Cloudflare edge settings.

Fix path: Renew or issue certs through Cloudflare or your host, update asset URLs to HTTPS only, and block insecure third-party scripts that pull over HTTP.

3. Email authentication for lead follow-up

Signal: SPF passes for your sending provider, DKIM signs messages correctly, and DMARC is at least set to `p=none` during rollout with reporting enabled. If you are already sending sales email at scale, I want alignment passing too.

Tool or method: MXToolbox-style checks, mail-tester tools, provider dashboards.

Fix path: Publish correct DNS records for the sender you actually use. Then move DMARC from monitoring to enforcement once reports stay clean.

Example DNS record pattern:

```txt v=spf1 include:_spf.google.com include:sendgrid.net -all ```

4. Secret exposure review

Signal: No API keys, private tokens, webhook secrets, database URLs with credentials in public code paths or client-side bundles. I also look for secrets in old commits because deleted files are not enough.

Tool or method: Repo scan tools like GitHub secret scanning equivalents, local grep search for common key patterns, build artifact inspection.

Fix path: Move secrets to environment variables or managed secret storage. Rotate anything that was ever exposed publicly. Assume leaked keys are compromised until proven otherwise.

5. Form security and abuse resistance

Signal: Lead forms reject malformed input server-side, limit repeated submissions from the same source, and do not expose internal errors to users. A bot should not be able to hammer your contact form all day without friction.

Tool or method: Manual submission tests with bad payloads plus rate-limit checks.

Fix path: Add server-side validation rules on every field category by category. Add rate limiting by IP plus fingerprint where appropriate. Add honeypot fields or CAPTCHA only if spam volume justifies the conversion trade-off.

6. Monitoring and incident visibility

Signal: You get an alert when the site is down or returning errors for more than a few minutes. The alert goes somewhere actionable like email plus Slack plus SMS for critical pages.

Tool or method: Uptime monitor setup review plus synthetic checks from multiple regions.

Fix path: Configure uptime checks on homepage and form endpoints separately. Alert on TLS expiry too because expired certs cause avoidable outages that look like security failures to visitors.

Red Flags That Need a Senior Engineer

1. You have no idea where your domain registrar login lives.

That usually means DNS changes can be blocked by access chaos during a launch problem.

2. Your landing page sends form data directly to client-side scripts with hidden API keys.

That is how you leak credentials into the browser bundle and invite abuse.

3. You cannot explain who owns email deliverability.

If SPF/DKIM/DMARC are not controlled now, your outbound sales flow will fail later when volume rises.

4. You have three hosting layers stitched together by guesswork.

Prototype stacks often break when traffic increases because nobody knows which layer caches what.

5. You already had one "small" outage that took hours to fix.

That is a signal the system has no rollback discipline, weak observability, or both.

If any two of those are true, I would stop DIYing this part of the stack and bring in a senior engineer before you scale traffic further.

DIY Fixes You Can Do Today

1. Check your public surface area

Make a list of every public domain and subdomain you own. Remove anything unused unless it has a clear purpose like app., mail., docs., or status..

2. Turn on HTTPS everywhere

Force HTTPS at the edge only once. Test homepage links on mobile Safari and Chrome because mixed-content issues often show up there first.

3. Verify your email DNS records

Confirm SPF includes only approved senders. Confirm DKIM is enabled in your email provider dashboard. Add DMARC reporting so you can see failures before they damage reply rates.

4. Scan for exposed secrets

Search your repo history for `api_key`, `secret`, `token`, `password`, `private_key`, and webhook URLs with credentials embedded in them. Rotate anything suspicious immediately.

5. Add basic monitoring

Set up uptime checks on the homepage plus contact form endpoint from at least two regions. Alert yourself if downtime lasts more than 3 minutes so you do not discover it from a lost lead report later.

Where Cyprian Takes Over

Here is how I would handle it:

| Failure found | Deliverable included in Launch Ready | Timeline impact | |---|---|---| | Broken domain routing | DNS setup + redirects + subdomain cleanup | First 4-8 hours | | Missing SSL / mixed content | SSL configuration + HTTPS enforcement | Same day | | No Cloudflare protection | Cloudflare setup + caching + DDoS protection | Same day | | Email deliverability risk | SPF/DKIM/DMARC records + verification | First 8-12 hours | | Exposed secrets | Environment variables + secret cleanup + rotation plan | First day | | No monitoring / alerts | Uptime monitoring + alert routing + handover checklist | Day 2 | | Weak deployment process | Production deployment + rollback notes + handover docs | Day 2 |

In 48 hours I would get the public surface hardened first so traffic can land safely before we polish anything else.

The practical delivery order looks like this:

1. Audit domain and hosting access. 2. Lock down DNS records. 3. Put Cloudflare in front of the site. 4. Enforce SSL across all entry points. 5. Validate email authentication. 6. Move secrets out of code. 7. Confirm production deployment works end-to-end. 8. Add uptime monitoring. 9. Hand over a checklist you can actually use after launch day.

If your current setup has more than one critical failure - especially around secrets exposure or broken email auth - I would treat that as launch risk rather than cosmetic cleanup risk.

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 proxying: https://developers.cloudflare.com/dns/
• Google Search Central on HTTPS best practices: https://developers.google.com/search/docs/crawling-indexing/https-guidelines

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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.*