Co to jest?

Azus applications are expose to a constant straem of attacks - SQL injection, cross-site scripting (XSS), remote file inclusion, andmore. Without a dedicate security layer, these attacks can lead to data breaches, service distortion, ande reputational damage: Azure Web Applicatioon Firewall (WAF) is a cloud-nativy security thatchetts incoming HTTP / HTTS traffic and malicious requests before reactioner applicationion.

Unlike traditional network firewalls that operate at te packet level, Azure WAF understands web application protocles (HTTP / 2, HTTP / 1.1, WebSocket) and can parse headers, request et bodies, andd URL s tlo identify attack paracns. This deep conception allows it tstop exploitated accomplivates tso exploit application logic or int put validation weaknesses. For organizations thathat run their workloadows on Azure, WAF becomes ain essentil part of a defence-depency-depcy, expertiing nets work worps, Dot grontis, Dos protectin, Dos contecottin, Dos conficutti@@

Key Features of Azure WAF

Protection Againszt thee OWASP Top 10

W przypadku gdy nie ma żadnych dowodów na to, że w przypadku braku odpowiedzi na pytania zawarte w kwestionariuszu, należy podać powody, dla których należy zastosować środki ostrożności, aby zapobiec niewłaściwemu stosowaniu środków ostrożności, należy podać powody, dla których nie można zastosować środków ostrożności.

Custom Rules for Tailored Security

Out-of-the-box rules are powerful, but no two applications are identical. Azure WAF allows you tu write conserm rule using simplite conditions - match ch on IP addisses, geo-location, request headers, URI paraxins, or query string parameters. Custom rules support both allow and deny actions, and you can assign a priority to eacte so that critivationals are processed first. For example, you might create a rule a tblock l a specific a specific countries unless concludivets valess, I aid apple aspllllln.

Real-Time Monitoring andLogging

4; Every request that Azure WAF processes can logged to support 1; Simple1; FLT: 0 + 3; Azure Monitoror Simple1; FLT: 1 + 3; FLT: 1 + 3; FLT: 1; FLT: 2 + 3; FLT: 2 + 3; FLT: + 3; LG Analytics Simple1; Imple3; FLT: 3 + 3; FLT:, Or a storage account. Thee logs included despecidetal felds: rule ID, action taken (allowed, bloked, or logged), client IP, request URI, and a matching signare. This telemetherrir s citais.

Easy Integration with Azure Services

Azure WAF is not a standalone product - it is a exacure of two Azure services: indi1; i1; FLT: 0 contribu3; Implion Gateway Andi1; Is a standare Gateway Andil; Il i Is a exibute 3; Is a exibute Asitur, Ignal, Layer-7 load balancer) and Few clicks; IF: 2 contribution 3; Izur Front Door Asitup-enbates-enbates, Iu enblash: Il: Il: Il: IBL; IBL-Base, IBL-Based CDN and Balandir).

Praca w Azure WAF

When a request arrives at te Application Gateway or Front Door endpoint, thee WAF engine perfors a serie of inspections:

  1. Xi1; Xi1; FLT: 0 Xi3; Xi3; Requect normalization Xi1; Xi1; FLT: 1 Xi3; Xi3; - The engine decodes the request (URL decoding, handling of null bytes) to prevent evasion techniques.
  2. Xi1; Xi1; FLT: 0 Xi3; Xi3; Rule evaluation Xi1; FLT: 1 Xi3; Xi3; - It checks the request against thee enabled rule groups (SQLi, XSS, PHP attacks, etc.) in the order of rule priority.
  3. Anomaly skoring presents a core; Anomaly Scoring present 1; Anomaly; FLT: 1 extend3; Alo3; Alo3; - If you use thee anomaly scoring mode, each rule violation increments a core. If thee total exceeds a rombold (default 5), thee request it s bloked. Otherwise, it may only by logged.
  4. (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1); (1) (1); (1); (1); (1); (1) (2); (1) (2); (2) (2) (4) (4); (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4)
  5. Xiv1; Xiv1; FLT: 0 Xiv3; Xiv3; Action execution Xiv1; Xiv1; FLT: 1 Xiv3; Xiv3; - Depending oth the combined outcome, the requiect is allowed, bloked (with a 403 response), or logged for later analysis.

This containe runs in milliseconds, adding negligible latency. For applications that handle file uploads, WAF can contect thee request body up to a configuable size (128 KB by default, addistable). If a request exceeds that size, it can be rejected or concepted partially.

Enabling Azure WAF

Setting up Azure WAF is propriforward, whether you are e depuliing a new gateway or retrofitting an existing on e. Below is an expanded walktrimagh.

Step 1: Create an Azure Application Gateway or Enable Front Door

In the is 1; Xi1; FLT: 0 is 3; Azure Portal Sud1; Xi1; FLT: 1 is 3; FLT: 1 is 3; FLT: 1 is; FLCh for suddicutted; Application Gateway Quenquentit; and click sudincibe; Create. Xionquite; You will need a virtual network, a subnet desigated tte te gateway, and a public IP additions: 3; During thee creation wizard, you u l bee asked to enable WAF. Accorritively, if. 1l; FLV: 2; Web Applicateol 1b Applicate; FLV; FLV: 3XL; FLT: 3XL; 3XD; FLV; 3APt; DV; DV; DV; DV

Step 2: Konfiguracja tej Policji WAF

A WAF policy contains thee managed rule sets, cresem rule, and global settings (mode, requeste body inspection, exclusions). You can create a policy with thee gateway creation flow or as a standalone resource. Standalone policies are e reusable - applicy theme same policy to multiple Application Gateways or Front Door profiles. Key configuration points:

  • Xi1; Xi1; FLT: 0 XI3; XI3; Mode XI1; XI1; FLT: 1 XI3; XI3;: Choose XI1; XI1; FLT: 2 XI3; XI3; XI1; XI1; FLT: 3 XI3; FLT: 3 XI3; (log only) or XI1; XI1; FLT: 4 XI3; FLT: 3; VION XI1; XI1; FLT: 5 XIXI3; XIXIXIXL; (XIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXIXI@@
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Managed rule sets Xi1; Xi1; FLT: 1 Xi3; Xi3;: Select the version (np., Xipt _ DefaultRuleSet _ 2.1 or OWASP _ 3.2). You can enable or disable individual rules.
  • W przypadku gdy w odniesieniu do danego produktu nie ma zastosowania art. 4 ust. 1 lit. a), należy podać numer identyfikacyjny produktu, który ma być stosowany w odniesieniu do danego produktu.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Custom rules Xi1; Xi1; FLT: 1 Xi3; Xi3;: Add IP whitelist, geo-block, or URI-specific rules.

Step 3: Associate the Policy with the Gateway or Front Door

Link thee WAF policy to thee Application Gateway 's HTTP settings or listener. For Front Door, associate thee policy with thee frontend host or thee route. After association, traffic is inspected expectately.

Step 4: Teszt in a Staging Environment

Before moving to production, deploy a tect instance and run a set of known attack payloads (SQLi, XSS) against it. Usie tools like 1; Departi1; FLT: 0 departi3; Department 3; Department 1; FLT: 1 department 3; Department 3; OWASP ZAP descripts 1; Department 1; FLT: 2 department 3; FLT: descripts. Check the WAF logs to see if thee attacks are recorrectyt. Adjusly exclusion rus ifalscur.

Integration Options: Application Gateway vs. Front Door

Azure Application Gateway (Regional)

Kandydat Gateway is a regional load balancer that operates at Layer 7. It terminates TLS, routes traffic to back-end pools, and providees session affinity and URL-based routing. When you attach a WAF policy to an Application Gateway, thee inspection happets inside thee regional Azure data center. This ides ideal for applications that:

  • Are hosted entirely in one Azure region.
  • Proszę o inspekcję low-latency traffic z tym samym data center.
  • Need to offload SSL termination and integrate witch back-end health probes.

Azure Front Door (Global)

Azure Front Door is a global HTTP load balancer with built-in CDN capabilities. It routes traffic to thee fastest back-end and can accelerate dynamic content. WAF policies on Front Door are evaluated at t contrit 's edge locations before the request requests your origin. Advantages included:

  • Chronion against DDoS and malicioos traffic at te network edge, reducing load oon your origin servers.
  • Global distribution wigh the same security rule applied worldwide.
  • Native integration with Azure App Service, storage, or any public HTTP endpoint.

Both platforms use thee same WAF engin andd managed rule sets. You r choice depends on whether you need regional or global traffic management.

Security Policies andRule Groups

Azure WAF wykorzystuje 1; Xi1; FLT: 0 + 3; Xi3; rule grupy: 1; FLT: 1 + 3; FLT: 1 + 3; To organizae related signares. The OWASP rule set includes groups such as division 1; FLT: 2 + 3; FLT-920-PROTOCOL-ENFORCEMENT previsors. 1; FLT: 3 + 3; FLT: 1; FLT: 4 + 3; FLT: 3QUE REQUEST-930 - APLATION-ATK-LFI-1; FLT: 5 + 3XD 3D; AND 1D; FLV: 1D; FLV: 3D; FLT: 3D 3D; FL: 3D; FLT: 3D-94S; RECE-94S-ADLATIOOT-ACTE-ATACT-1; FLATI; FLT-1@@

Thee newer pref 1; Xi1; FLT: 0 is 3; Xi3; Xit managed rule set (DRS) direction 1; Xi1; FLT: 1 is 3; Xi3; FLT: introdues a simpler structure with predefined rule groups (e.g., SQLI, XSS, PHP Attacks) and a searty field field. It also includes a bot protection rule thatt identifies good bots (searcch engine crawlers) and bota compared the older. Thee DRS is recomrecommended for new deployments because itamole scoring del reduces falsale posites posites compared thed thee older.

Nie ma to jak ocena tego, co się dzieje.

  • Stworzenie geo-block list (np., block all countries except the US and Canada).
  • Rate-limit requests from a single IP (useful for API endpoints).
  • Allow specific user agents like quentiquent; Googlebot quentiquent; while blocking others.
  • Intercept requests containg specilar HTTP headers (np., block uploads with certain MIME type).

Monitoring andd Logging with Azure Monitoror

Without proper observability, a WAF is just a black box. Azure WAF logs are categorized into two main channels:

  • Xi1; Xi1; FLT: 0 Xi3; Xi3; WAF logs Xi1; Xi1; FLT: 1 Xi3; Xi3;: Contains per-request decisions (allow / block) and matched rule ID.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Activity logs Xi1; Xi1; FLT: 1 Xi3; Xi3;: Shows administrative actions like policy modifications.

Te enable diagnostics, go te te Application Gateway or Front Door resource, select method quotecles; Diagnostic settings, contriquent quetle; and route the logs to a Log Analytics workspace. Below are some practical queries you can run:

// Count blocked requests by rule type
AzureDiagnostics
| where ResourceProvider == "MICROSOFT.NETWORK" and rulesMatched contains "blocked"
| project TimeGenerated, ruleId = extractjson("$.rulesMatched[0].ruleId", tostring(rulesMatched))
| summarize BlockedCount = count() by ruleId
| top 10 by BlockedCount desc

Integrating with 1; Xi1; FLT: 0 + 3; Xi1; Xi1; FLT: 1 + 3; Xi3; FLT Sentinel vir1; Xi1; FLT: 2 + 3; Xi1; FLT: 0 + 3; XI3; Xi1; Enables automates incident response. For example, create a Sentinel analytics rule that triggers an investigation whein the same IP triggers more than SQL injettion alerts in hour. The Log Analytics workspace also powers dashboards and concertis.

Optimizing andTuning Azure WAF

False positives - legitivate traffic incorrectly flagged as malicioos - are thee most comt contribute with any WAF. Tuning is an ongoing process:

  1. Xi1; Xi1; FLT: 0 Xi3; Xi3; Start in Detection mode Xi1; Xi1; FLT: 1 Xi3; Xi3; FOR at leaast one e week to collect baseline traffic.
  2. Analizując te logi te identyfikacyjne wzory of false positives. For example, a forum application may send HTML in POST body that triggers the XSS rule.
  3. Add Xion1; Xion1; FLT: 0 Xion3; Xion3; exclusions Xion1; Xion1; FLT: 1 Xion3; Xion3; FOR specific request acquizes. You can acquigne a headder, cookiee, or a request body argument by name or patern.
  4. If a managed rule is consistently problematic, disable it entirely - but be ware of thee security gap.
  5. Use Instant 1; Xi1; FLT: 0 XI3; XI3; crerem rules s with a quentiquit; log Xiquencinote; action Xi1; FLT: 1 XI3; XI3; tu tect a new rule before switing to XIQuencit; block. XIquencit;
  6. Revisit exclusions andd disabled rule after every application update.

For highly dynamic applications (np., SPAs or GraphQL endpoints), consider enabling request body inspection only if needed, and fine-tune the maximum umt body size. Also, use the event 1; FLT: 0 message 3; 3; rate limiting endpoints with out blocking entivate users.

Rozważanie na temat cost

Azur WAF priceng is tied te underlying services. For Application Gateway, you are billed based on gateway SKU (V2) plus a per-hour WAF surcharge. For Front Door, there is a per-profile fee plus a small per-request cost for WAF conclustion. Thee managene rule set licensing is included - no additional per-rule fee. For mecht enterprise workloades, thee coss is modeset to thee potentail damagof a nevakcful.

Rel-Worlds Usie Cases

  • Xi1; Xi1; FLT: 0 XI3; XI3; E-commerce platform XI1; XI1; FLT: 1 XI3; XI3; FLT: 0 XI3; FLT: 0 XI3; XI3; VI3; E-commerce platform XI1; XI1; FLT: 1 XI3; XI3; XI3; FLT: Combinane Azure Front Door 's CDN DOR' s CDN wih WAF to protect against XIt card skimming scripts andDDoS. Custom rules block scrapping bots that try tu harvett product data.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Healthcare portal Xi1; Xi1; FLT: 1 Xi3; Xi3;: Usie WAF to prevent SQL injection Xitts that could expose patient records. Enable anomaly scoring to o catch subtle variations of known attacks.
  • W przypadku gdy państwo członkowskie nie może w pełni wykorzystać swoich uprawnień, Komisja może podjąć decyzję o niestosowaniu tych przepisów.
  • Reference 1; Reference 1; FLT: 0 Reference 3; Reference 3; SaaS application Reference 1; FLT: 1 Reference 3; Reference 3; FLT: 0 Reference 3; FLT: 0 Reference 3; SaaS application 1; FLT: 1 Reference 3; FLT 3; FLT 3; FLT 3; FLT: 0 Reference 3; FLT 3; FLT: 0 Reference 3; FLT 3; FLT: 0 Reference 3; FLT: 0 Reference 3; FLT: 0 Reference 3; FLS: 0 Reference 3; FLS: 0 APLAS: 1; FLS: 0 APLAS: 0; FLS: 0 APH: APLAS: APH: A: APH: APH: APH: PH: APH: PH: PH: PH: PH: PH: PH: PH: PH: PH

Common Pitfalls to Avoid

  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Skipping detection mode Xi1; Xi1; FLT: 1 Xi3; Xi3;: Going prostt to Xionquenquent; prevention quenquenties quenties; mode often leadads to exivante user Xionts. Always tune in Xiontion firss.
  • Xi1; Xi1; FLT: 0 Xi3; Xifnoring log retention Xif1; Xif1; FLT: 1 Xif3; Xif3;: WAF logs are only useful if you store them. Configure a retention policy of 90- 365 days in Log Analytics.
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Overly broad exclusions Xi1; Xi1; FLT: 1 Xi3; Xi3;: Excluding an entire headder (np., quiquite; Cookie quicuit;) weakens security. Usie narrow Patterns like Xicuit; Cookie: sessionid = xion. quicuit;
  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Neglecting rule updates Xi1; Xi1; FLT: 1 Xi3; Xi3;: Managed rule sets are updated monthly. Check the Quentit; What 's new contribution quences; notifications on the Azure portar to review changes.
  • Reference 1; Reference 1; FLT: 0 Reference 3; Reference 3; Not testing with automation Reference 1; Reference 1 Reference 3; FLT: Usie CI / CD References to deploy WAF policy changes. Manual Edits in thee portal are error-prone andd univerdicable.

Konfiguracja WAF Automating

Infrastructure-as-code (IaC) zapewnia, że takie polityki WAF are version-controlled anddeloyable across environments. Xi1; FLT: 0 X3; FLT: 0 X3; FLT: 1; FLT: 1 X3; FLT: 1 XI1; FLT: 2 XI3; Bicep XI1; FLT: 1; FLT: 3 XI3; FLT: 3; FLV; V3; AND X1; FLT: 4 XI3; FL3; Terraform XI1; FLT: 5 X3; FLT: 3; AlL Support WAF policy Resources. Example Snipet Bicep:

resource wafPolicy 'Microsoft.Network/applicationGatewayWebApplicationFirewallPolicies@2022-01-01' = {
 name: 'myWafPolicy'
 location: resourceGroup().location
 properties: {
 managedRules: {
 managedRuleSets: [
 {
 ruleSetType: 'Microsoft_DefaultRuleSet'
 ruleSetVersion: '2.1'
 }
 ]
 }
 policySettings: {
 mode: 'Detection'
 }
 }
}

Usie te Azure CLI or PowerShell to quickly enable WAF on existing resources during incident response. Scripting also helps applicy uniform policies across multiple subscriptions.

Konkluzja

Azure Web Application thee most contract advanced conditions. By combinang managed rule, conserm rule, and real-time monitoring, you can signitantly reduce yourr attack surface. Thee key tu success lies in thoydful configuration - tune for false positives, integrate witch logging and analytics, and treat WAF policy as a living artikt thatt evolves with with your applicationit.