Compute
Elastic Cloud Server
Huawei Cloud Flexus
Bare Metal Server
Auto Scaling
Image Management Service
Dedicated Host
FunctionGraph
Cloud Phone Host
Huawei Cloud EulerOS
Networking
Virtual Private Cloud
Elastic IP
Elastic Load Balance
NAT Gateway
Direct Connect
Virtual Private Network
VPC Endpoint
Cloud Connect
Enterprise Router
Enterprise Switch
Global Accelerator
Management & Governance
Cloud Eye
Identity and Access Management
Cloud Trace Service
Resource Formation Service
Tag Management Service
Log Tank Service
Config
OneAccess
Resource Access Manager
Simple Message Notification
Application Performance Management
Application Operations Management
Organizations
Optimization Advisor
IAM Identity Center
Cloud Operations Center
Resource Governance Center
Migration
Server Migration Service
Object Storage Migration Service
Cloud Data Migration
Migration Center
Cloud Ecosystem
KooGallery
Partner Center
User Support
My Account
Billing Center
Cost Center
Resource Center
Enterprise Management
Service Tickets
HUAWEI CLOUD (International) FAQs
ICP Filing
Support Plans
My Credentials
Customer Operation Capabilities
Partner Support Plans
Professional Services
Analytics
MapReduce Service
Data Lake Insight
CloudTable Service
Cloud Search Service
Data Lake Visualization
Data Ingestion Service
GaussDB(DWS)
DataArts Studio
Data Lake Factory
DataArts Lake Formation
IoT
IoT Device Access
Others
Product Pricing Details
System Permissions
Console Quick Start
Common FAQs
Instructions for Associating with a HUAWEI CLOUD Partner
Message Center
Security & Compliance
Security Technologies and Applications
Web Application Firewall
Host Security Service
Cloud Firewall
SecMaster
Anti-DDoS Service
Data Encryption Workshop
Database Security Service
Cloud Bastion Host
Data Security Center
Cloud Certificate Manager
Edge Security
Situation Awareness
Managed Threat Detection
Blockchain
Blockchain Service
Web3 Node Engine Service
Media Services
Media Processing Center
Video On Demand
Live
SparkRTC
MetaStudio
Storage
Object Storage Service
Elastic Volume Service
Cloud Backup and Recovery
Storage Disaster Recovery Service
Scalable File Service Turbo
Scalable File Service
Volume Backup Service
Cloud Server Backup Service
Data Express Service
Dedicated Distributed Storage Service
Containers
Cloud Container Engine
SoftWare Repository for Container
Application Service Mesh
Ubiquitous Cloud Native Service
Cloud Container Instance
Databases
Relational Database Service
Document Database Service
Data Admin Service
Data Replication Service
GeminiDB
GaussDB
Distributed Database Middleware
Database and Application Migration UGO
TaurusDB
Middleware
Distributed Cache Service
API Gateway
Distributed Message Service for Kafka
Distributed Message Service for RabbitMQ
Distributed Message Service for RocketMQ
Cloud Service Engine
Multi-Site High Availability Service
EventGrid
Dedicated Cloud
Dedicated Computing Cluster
Business Applications
Workspace
ROMA Connect
Message & SMS
Domain Name Service
Edge Data Center Management
Meeting
AI
Face Recognition Service
Graph Engine Service
Content Moderation
Image Recognition
Optical Character Recognition
ModelArts
ImageSearch
Conversational Bot Service
Speech Interaction Service
Huawei HiLens
Video Intelligent Analysis Service
Developer Tools
SDK Developer Guide
API Request Signing Guide
Terraform
Koo Command Line Interface
Content Delivery & Edge Computing
Content Delivery Network
Intelligent EdgeFabric
CloudPond
Intelligent EdgeCloud
Solutions
SAP Cloud
High Performance Computing
Developer Services
ServiceStage
CodeArts
CodeArts PerfTest
CodeArts Req
CodeArts Pipeline
CodeArts Build
CodeArts Deploy
CodeArts Artifact
CodeArts TestPlan
CodeArts Check
CodeArts Repo
Cloud Application Engine
MacroVerse aPaaS
KooMessage
KooPhone
KooDrive
Help Center/ Cloud Firewall/ User Guide/ Attack Defense/ Blocking Network Attacks

Blocking Network Attacks

Updated on 2024-12-31 GMT+08:00

CFW provides attack defense to help you detect common network attacks.

Impacts on Services

To change the protection mode, you are advised to enable the Observe mode and check false alarms for a period of time and then switch to the Intercept mode.

Adjusting the IPS Protection Mode to Block Network Attacks

  1. Log in to the management console.
  2. Click in the upper left corner of the management console and select a region or project.
  3. In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
  4. (Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.
  5. In the navigation pane, choose Attack Defense > Intrusion Prevention. Enable Basic Protection.
  6. Select a proper protection mode.

    • Observe: Attacks are detected and recorded in logs but are not intercepted.
    • Intercept: Attacks and abnormal IP address access are automatically intercepted.
      • Intercept mode - loose: The protection granularity is coarse. In this mode, only attacks with high threat and high certainty are blocked.
      • Intercept mode - moderate: The protection granularity is medium. This mode meets protection requirements in most scenarios.
      • Intercept mode - strict: The protection granularity is fine-grained, and all attack requests are intercepted.
    NOTE:
    • You are advised to use the observe mode for a period of time before using the intercept mode. For details about how to view attack event logs, see Attack Event Logs.
    • If packets are incorrectly blocked by a defense rule, you can modify the action of the rule in the basic defense rule library. For details, see IPS Rule Management.

Enabling Sensitive Directory Scan Defense

  1. Log in to the management console.
  2. Click in the upper left corner of the management console and select a region or project.
  3. In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
  4. (Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.
  5. In the navigation pane, choose Attack Defense > Intrusion Prevention. Enable Basic Protection.
  6. Click Advanced. In the Sensitive Directory Scan Defense area, click to enable protection.

    • Action:
      • Observe: If the firewall detects a sensitive directory scanning attack, it only records the attack in Attack Event Logs.
      • Block session: If the firewall detects a sensitive directory scan attack, it blocks the current session.
      • Block IP: If CFW detects a sensitive directory scan attack, it blocks the attack IP address for a period of time.
        NOTE:

        After Block IP is configured, CFW continuously blocks IP addresses. If address translation or proxy is involved, evaluate the impact of blocking IP addresses with caution.

    • Duration: If Action is set to Block IP, you can set the blocking duration. The value range is 60s to 3,600s.
    • Threshold: CFW performs the specified action if the scan frequency of a sensitive directory reaches this threshold.

Enabling Reverse Shell Defense

  1. Log in to the management console.
  2. Click in the upper left corner of the management console and select a region or project.
  3. In the navigation pane on the left, click and choose Security & Compliance > Cloud Firewall. The Dashboard page will be displayed.
  4. (Optional) Switch to another firewall instance: Select a firewall from the drop-down list in the upper left corner of the page.
  5. In the navigation pane, choose Attack Defense > Intrusion Prevention. Enable Basic Protection.
  6. Click Advanced. In the Reverse Shell Defense module, click to enable defense.

    • Action:
      • Observe: If the firewall detects a reverse shell attack, it only records the attack in Attack Event Logs.
      • Block session: If the firewall detects a reverse shell attack, it blocks the current session.
      • Block IP: If CFW detects a reverse shell attack, it blocks the attack IP address for a period of time.
        NOTE:

        After Block IP is configured, CFW continuously blocks IP addresses. If address translation or proxy is involved, evaluate the impact of blocking IP addresses with caution.

    • Duration: If Action is set to Block IP, you can set the blocking duration. The value range is 60s to 3,600s.
    • Mode:
      • Conservative: coarse-grained protection. If a single session is attacked for four times, observation or interception is triggered. It ensures that no false positives are reported.
      • Sensitive: fine-grained protection. If a single session is attacked for two times, observation or interception is triggered. It ensures that attacks can be detected and handled.

Follow-up Operations

For details about the protection overview, see Viewing Attack Defense Information on the Dashboard. For details about logs, see Attack Event Logs.

We use cookies to improve our site and your experience. By continuing to browse our site you accept our cookie policy. Find out more

Feedback

Feedback

Feedback

0/500

Selected Content

Submit selected content with the feedback