Rules and WAF protection

Readable detectors and rules, an anomaly score, modes per site, per rule and per path, narrow exceptions, virtual patches and a progressive rollout. You observe first, block later, and can always go back.

All functions

Where to find it in the console : Protection menu: Rules, Exceptions and Policies; Analysis menu: False positives; the Protection tab of a site.

What it is for

Observe before blocking

A new site starts in detection mode: everything is inspected and recorded, nothing is blocked. A report shows what would have been refused before you switch to blocking.

Decisions that explain themselves

Each event says which rule reacted, where (parameter, header, body), with which score and which action. No black box: you can replay a request and see the decision.

Fix a false positive without weakening the site

An exception targets one rule, one parameter, one path and one address, with an expiry date. The rest of the protection does not change.

Change the rules without taking a risk

Simulation on past traffic, rollout to a share of the nodes or of the requests, comparable versions and rollback in one step.

How ToutWAF decides

Every request goes through the same steps. The result is a decision, recorded with its evidence.

Detectors and rules

The built-in detectors (injections, deserialization, request smuggling, uploads, protocol), the OWASP CRS and your own rules look at the request. The catalogue documents more than 300 TW- error codes.

An anomaly score

Each detection adds points according to its severity: 5 for critical, 4 for error, 3 for warning, 2 for notice. The default inbound threshold is 5: one critical detection blocks, two warnings (3 + 3) block, a single warning is only logged.

The mode decides the action

Off, detection or blocking, depending on the site, the rule, the path and the method. Some rules act on their own without going through the score, for example a fake Googlebot or an unsigned JWT.

A visitor's requestDetectors, CRS and your ruleseach detection carries a TW- codeAnomaly scorecompared with the inbound thresholdDecision according to the modelog, challenge, slow down, block...
Illustration: from the request to the decision.

Three modes, at every level

Gratis

The mode is set for the whole site, but also for one rule, a family of rules, a path or a method. A rule can also change its action: log, challenge, slow down, decoy, block or redirect.

  • A new site is in detection: events carry the action that would have been taken, without it being applied.
  • Paranoia levels from 1 to 4 (1 by default), per site or per path. You go up one level at a time, in detection, and read the report before blocking.
  • A percentage of the requests can enforce blocking (ENFORCE_PERCENT): a canary at request level.
  • If the engine fails or exceeds its time budget, the site chooses to let requests through or to refuse them (per site). Choose refuse for a payment, let through for a brochure site.
Offnothing is inspectedDetectioninspected and loggedBlockingdecisions enforced
Illustration: the three modes of a site.

OWASP CRS and SecLang

Gratis

The OWASP Core Rule Set v4 is evaluated by ToutWAF's own SecLang parser and evaluator, with the plug-ins that match the technology detected on your site.

  • The definitions catalogue holds about 85 sources, checked every hour, verified before use and rolled back if they fail.
  • Starting templates: generic, WordPress, Laravel, Symfony, Django, Spring, Node and single-page application.
  • You can target a CRS identifier or a range (for example 942100-942999) in a mode or an exception.

The complete CRS v4 was only tested on a reduced fixture.

Your own rules

Gratis

A readable condition language, with a visual editor and a text editor that stay in sync.

  • Rule tester: replay a request against the current policy and see the decision.
  • Dry run on real traffic: the rule is replayed on seven days of recorded requests, without enforcing anything.
  • Rule tests that run in continuous integration, with JUnit output.

The console validator and the engine accept slightly different subsets of the language: always verify a rule with a test.

Narrow exceptions and rule overrides

Gratis

When a rule reacts wrongly, you work around it as narrowly as possible instead of switching it off.

  • An exception covers one rule, one parameter (argument, header, cookie, JSON field or body), a path prefix and an address, with an expiry and a reason.
  • From an event, the button « This is a false positive » proposes the narrowest exception and shows its effect on the recorded events before creating it.
  • ToutWAF also suggests exceptions from the traffic: you accept or dismiss them.
  • A rule override changes the mode or action of a rule, a tag or a family, for a path and methods. Every change is versioned, compared and audited.

Example of rule overrides, in the policy of a site

YAML
rule_overrides:
  - { rule: tw-sqli-orderby-probe, mode: detect }
  - { rule: "tag:attack-xss", mode: block, path_prefix: /checkout }
  - { rule: "family:4xxx", action: challenge, methods: [POST] }

A policy that is inherited

Gratis

Settings go from general to specific: global, then per organisation, per site and per path. The more specific one wins.

  • Every change is a version: structured difference, history and rollback in one step.
  • Four-eyes approval: a second reviewer approves a version before it goes live.
  • Policy as code: export, validate, compare and apply YAML or JSON from your continuous integration.
GlobalOrganisationSitePath
Illustration: the levels of the policy, from the most general to the most specific.

Put a rule live without risk

The recommended path is: observe, review, simulate, switch, watch, and keep the rollback ready.

Draft

You change the policy in a draft; nothing is published.

Simulation

The policy is replayed on past traffic: requests that would be newly blocked or allowed.

Canary

A share of the nodes, a share of the requests or a single rule; you watch, then extend.

Publication and rollback

Publication is automatic and fast; if a node refuses the policy, it goes back to the last accepted version.

DraftSimulation on past trafficCanaryshare of nodes or requestsActive versionrollback in one step
Illustration: from the draft to the active version.

Virtual patches

Gratis

A known vulnerability is blocked at the WAF while the application waits for its fix.

  • A built-in catalogue covers Log4Shell, Spring4Shell and Confluence flaws, among others, and can be switched on per site.
  • Emerging Threats Open signatures are converted only when the translation is exact; they log by default.
  • CISA KEV advisories are informational until a verified pattern exists: they block nothing.

Automatic rules

GratisPro en hoger

ToutWAF settles its false positives and moves from observation to blocking, with evidence you audit and undo.

  • Free: the self-test of a site, the false-positive estimate per rule group, the « Ready to block » indicator and the decisions journal.
  • Licence required: the Automatic profile (log, challenge, then block one rule group at a time) and the automatic exceptions, narrow and time-limited.
  • Guardrails: only protocol and web-injection rules can be worked around automatically, never by switching the rule off, and everything can be undone in one click.

What is not done, or not proven

We prefer to say it plainly.

  • Loading the complete CRS v4 was only tested on a reduced fixture.
  • Automatic rules were exercised by tests and a local bench, not on production traffic.
  • The only detection and performance figures published are in the documentation: they come from the project's own synthetic corpus, are not independent measurements and do not rank ToutWAF against any other product. This page gives none.
  • A WAF reduces risk, it does not replace fixing the application: keep your code's updates and access controls.

Use cases

Take a shop live without interruption

A week of detection, the report suggests a few narrow exceptions, you switch to blocking and keep the rollback ready.

React to a known vulnerability

A virtual patch blocks the exploit while the application waits for its update.

A rich-text editor triggers a rule

An exception limited to this field, this path and thirty days settles the case without touching the rest.

What is included, by edition

The basics are free; the advanced options need a paid offer. An option under licence stays visible in the console, locked, never hidden.

EditieGratis Inbegrepen in alle aanbiedingen, ook in de twee gratis (Free en Free +)Pro en hoger Betaalde aanbiedingen: zichtbaar in de console, vergrendeld zonder licentie. Vanaf Pro, tenzij Agency of Enterprise staat vermeld

Applicatiebescherming

  • SQL-injectie herkend aan de tokenstructuur in plaats van aan trefwoordlijsten, voor vijf dialectenGratis
  • NoSQL-injectie: operatoren en server-side JavaScript in queries, formulieren en JSON-bodiesGratis
  • Cross-site scripting: HTML-tokenizer met contextdetectors, SVG, DOM-sinks en polyglotsGratis
  • Commando-injectie en code-uitvoering: shell, PowerShell, interpreters en taal-evalGratis
  • Bestandsinclusie en padtraversal, met meervoudige decodering van codeeringenGratis
  • SSRF: verzoeken naar interne adressen, cloud-metadata en exotische schema'sGratis
  • XXE en XML-entiteitsuitbreiding, XPath-injectieGratis
  • Template-injectie: Jinja2, Twig, Freemarker, Velocity, ThymeleafGratis
  • Onveilige deserialisatie: Java, PHP, .NET, Python, YAMLGratis
  • LDAP, expressietalen (OGNL, SpEL), CRLF, open redirect en prototype pollutionGratis
  • HTTP request smuggling, strikte RFC 9112-framing en limieten tegen HTTP/2-misbruikGratis
  • Een body die groter is dan het inspectievenster wordt geweigerd of gemeld en nooit ongezien doorgestuurdGratis
  • Bestandsupload: extensie, dubbele extensie, magic bytes, webshell, macro's, optionele ClamAV-scanGratis
  • CMS-bescherming: WordPress, Drupal, Joomla, PrestaShop, Magento, NextcloudGratis
  • Scanners en aanvalstools (sqlmap, Nikto, Nuclei, Burp) en enumeratie via reeksen 404'sGratis
  • CSRF: controle van Origin en Referer, tokeninjectie in formulierenGratis
  • Sessiebescherming: fixatie, hijacking, cookie-versleutelingGratis
  • Begrensde parsing: limieten voor diepte, grootte en aantal parameters, reguliere expressies in lineaire tijdGratis

Regels, beleid en uitrol

  • OWASP CRS v4 ongewijzigd geladen, met de eigen SecLang-parser en -evaluator van ToutWAFGratis
  • Paranoia-niveaus 1 tot 4, per site of per padGratis
  • Anomaliescore met drempels voor inkomend en uitgaand verkeerGratis
  • Modi uit, detectie of blokkeren per site, per regel en per pad, met overschrijving van de actieGratis
  • Leesbare regeltaal voor uw eigen regelsGratis
  • Fijnmazige uitzonderingen per regel, parameter, pad en adres, met vervaldatum en voorbeeld van de impactGratis
  • Virtuele patches voor bekende kwetsbaarheden (Log4Shell, Spring4Shell, Confluence en meer), per site schakelbaarGratis
  • Valse positieven: van gebeurtenis naar de smalste uitzondering met één klik, met uitleg in gewone taalGratis
  • Simulatie: eerder verkeer afspelen tegen een conceptbeleidGratis
  • Detectierapport aan het einde van de observatieperiode, met voorgestelde uitzonderingenGratis
  • Geleidelijke uitrol: een deel van de nodes, een deel van de verzoeken of één regelGratis
  • Overerving van het beleid: globaal, organisatie, site, padGratis
  • Sjablonen: generiek, WordPress, Laravel, Symfony, Django, Spring, Node, single-page-appGratis
  • Versies, gestructureerde diff en terugdraaien in één stapGratis
  • Vierogenprincipe: goedkeuring voordat een versie live gaatGratis
  • Beleid als code: YAML of JSON exporteren, valideren, vergelijken en toepassen vanuit CIGratis
  • Regeltests die in CI draaien, met JUnit-uitvoerGratis
  • Automatische publicatie: elke wijziging wordt gecompileerd, gevalideerd en binnen enkele seconden naar de nodes gestuurd, met automatisch terugdraaien als een node haar weigertGratis

Automatische regels

  • Zelftest van de site: gewone verzoeken worden door uw data plane beoordeeld voordat iets wordt geblokkeerdGratis
  • Geschat percentage valse positieven per regelgroep en de indicator ‘Klaar om te blokkeren’Gratis
  • CRS-plug-ins voor de technologie die op uw site is herkendGratis
  • Logboek van automatische beslissingen met het bewijs, en ongedaan maken met één klikGratis
  • Profiel Automatisch: eerst alleen loggen, dan challenge, dan blokkeren, telkens één regelgroepPro en hoger
  • Automatische uitzonderingen: smal, met vervaldatum, alleen aangemaakt op basis van sterk bewijs in echt verkeerPro en hoger
  • Automatisch terugdraaien van een regelupdate die gewone verzoeken blokkeertPro en hoger

Terugkeren naar de standaardwaarde van een geavanceerde optie is altijd mogelijk. Wat er aan het einde van een betaalde licentie gebeurt, staat in de veelgestelde vragen over de prijzen: 48 uur coulance, 48 uur alleen-lezen, daarna staat de WAF-bescherming uit tot de verlenging.

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