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SolutionsWeb application security

When attacks come, your services stay up.

Cloudflare WAF, DDoS and bot protection in front of the services you already run. Built as code, tuned to your traffic, run by the engineers who built it.

Book your 30-minute Cyber Resilience Review
Web application security · Cloudflare

Definition

What is web application security?

It is the layer in front of your websites and APIs that checks every request before it reaches your servers. On Cloudflare, one network filters attacks, bots and abuse, so your origin only sees clean traffic.

  • WAF
  • DDoS protection
  • Bot Management
  • API Shield
  • Rate limiting
  • CDN

Proof

Bank of Cyprus keeps its digital channels available.

Average automatic mitigation time
~5 seconds
Bank of Cyprus · Cloudflare case study
Onboarding
Two weeks
Bank of Cyprus · Cloudflare case study
Large-scale attacks blocked, no manual intervention
3 months
Bank of Cyprus · Cloudflare case study

“The peace of mind is priceless, and our experience with Cloudflare and Parsectix has contributed significantly to achieving that.”

Stelios ParpasManager Security Operations Center, Bank of Cyprus
Read the case study

How does it protect your services?

Attacks are handled before they reach your origin, and every rule is code your team can read and review.

DDoS and bots

Attacks are absorbed at the edge.

DDoS managed rules and Bot Management act on each request before it reaches you. Mitigation is automatic; your team reads the summary.

Cloudflare · HTTP DDoS managed rulesetL7 DDOS

Severity: high

HTTP flood on the login page

Resourcewww.example.com/login

  1. 10:02Request rate climbs from thousands of sources
  2. 10:02Matched by the HTTP DDoS managed ruleset
  3. 10:02Flood dropped at the edge; real users served
  4. 10:30Event summary forwarded to your SIEM

ResolvedMitigated automatically. No rule was changed by hand.

Illustrative event, not a client incident

Cloudflare as code

New rules log first, then block.

Every WAF rule lives in Terraform. It logs against your real traffic first, then switches to block in a reviewed change.

cloudflare/zone-waf.tfTerraform+1−1
resource "cloudflare_ruleset" "zone_waf" {  zone_id = var.zone_id  kind    = "zone"  phase   = "http_request_firewall_custom"   rules {    description = "SQL injection on login"    expression  = <<-EOT      http.request.uri.path eq "/login"      and cf.waf.score.sqli lt 20    EOTRemoved:     action      = "log"Added:     action      = "block"AFTER LOG-MODE REVIEW  }}
Policy checkopa · waf-baselineFAIL · 1 rule→PASS · 0 rulesRules on login paths must block, not log.
Your hosting stays

It sits in front of what you run.

Your hosting stays put. Cloudflare filters traffic for AWS, another cloud or your data centre; the origin answers Cloudflare only.

curl -sI https://www.example.com | grep -iE '^(HTTP|server)'HTTP/2 200server: cloudflarecurl -sI --max-time 5 https://203.0.113.10curl: (28) Connection timed out after 5001 milliseconds# origin firewall allows Cloudflare IP ranges onlyPASSOrigin reachable through Cloudflare only

Plan, build, run. One team throughout.

  1. Step 01

    Plan the edge.

    DNS, TLS, traffic and current rules mapped into a design you review first.

  2. Step 02

    Build it as code.

    Zones, WAF, rate limits and bot rules in Terraform; DNS cutover planned with you.

  3. Step 03

    Run and tune.

    Rules tuned as your apps change, logs in your SIEM, engineers you reach directly.

FAQ

Common questions.

Usually the opposite: Cloudflare serves cached content from locations close to your users. We measure your own pages before and after cutover, so you see the effect on your traffic, not a benchmark.

No. Cloudflare sits in front of your existing hosting on AWS, another cloud or on premises. We move your DNS so traffic passes through Cloudflare first, then lock the origin to accept Cloudflare only.

New rules run in log mode first, so we see what they would block on your real traffic. We tune them to your application, then switch them to block in a reviewed change.

Yes. Cloudflare's DDoS protection looks at traffic patterns, not only request rates, so a sale-day spike is not treated as an attack. Challenges, not blocks, handle the grey areas.

Next step

Protect your digital channels.

Thirty minutes with an engineer: we look at your edge as it is today and tell you what we would change first. You keep the findings either way.

Book your 30-minute Cyber Resilience Review