- What's New
- Function Overview
- Product Bulletin
- Technology Poster
- Service Overview
- Billing
- Getting Started
-
User Guide
- Using IAM to Grant Access to HSS
- Accessing HSS
- Checking the Dashboard
- Asset Management
- Risk Management
- Server Protection
-
Container Protection
-
Container Firewalls
- Container Firewall Overview
- Configuring a Network Defense Policy (for a Cluster Using the Container Tunnel Network Model)
- Configuring a Network Defense Policy (for a Cluster Using the VPC Tunnel Network Model)
- Configuring a Network Defense Policy (for a Cluster Using the Cloud Native Network 2.0 Model)
- Container Cluster Protection
-
Container Firewalls
- Detection and Response
- Security Operations
- Installation and Configuration on Servers
- Installation and Configuration on Containers
- Account Management
- Plug-in Settings
- Authorization
- Monitoring and Auditing
- Enterprise Project Management
-
Best Practices
- HSS Best Practices You May Need
-
Suggestions on How to Fix Official Disclosed Vulnerabilities Provided by HSS
- Git Credential Disclosure Vulnerability (CVE-2020-5260)
- SaltStack Remote Command Execution Vulnerabilities (CVE-2020-11651 and CVE-2020-11652)
- OpenSSL High-risk Vulnerability (CVE-2020-1967)
- Adobe Font Manager Library Remote Code Execution Vulnerability (CVE-2020-1020/CVE-2020-0938)
- Windows Kernel Elevation of Privilege Vulnerability (CVE-2020-1027)
- Windows CryptoAPI Spoofing Vulnerability (CVE-2020-0601)
- Third-Party Servers Accessing HSS Through a Direct Connect and Proxy Servers
- Connecting Third-Party Servers to HSS Through Direct Connect and VPC Endpoint
- Installing the HSS Agent Using CBH
- Using HSS to Improve Server Login Security
- Using HSS and CBR to Defend Against Ransomware
- Using HSS to Scan and Fix Vulnerabilities
- Using HSS to Prevent Weak Passwords
- Using HSS to Scan for Trojans
- Using HSS to Handle Mining Attacks
- Using HSS to Monitor the Integrity of Linux Server Files
- Whitelist Can Be Used to Avoid False Alarm Reporting
-
API Reference
- Before You Start
- Calling APIs
-
API Description
-
Asset Management
- Collecting Asset Statistics, Including Accounts, Ports, and Processes
- Querying the Account List
- Querying Open Port Statistics
- Querying the Process List
- Querying the Software List
- Querying Automatic Startup Item Information
- Querying the Server List of an Account
- Querying the Open Port List of a Single Server
- Querying the Server List of the Software
- Querying the Service List of Auto-Started Items
- Obtaining the Account Change History
- Obtaining the Historical Change Records of Software Information
- Obtaining the Historical Change Records of Auto-started Items
- Asset Fingerprints - Process - Server List
- Asset Fingerprints - Port - Server List
- Querying the Middleware List
- Querying the Server List of a Specified Middleware
-
Ransomware Prevention
- Querying the Servers Protected Against Ransomware
- Querying the Protection Policy List of Ransomware
- Modifying Ransomware Protection Policies
- Enabling Ransomware Prevention
- Disabling Ransomware Prevention
- Querying the Backup Policy Bound to HSS Protection Vault
- Modifying the Backup Policy Bound to Vault
-
Baseline Management
- Querying the Weak Password Detection Result List
- Querying the Password Complexity Policy Detection Report
- Querying the Result List of Server Security Configuration Check
- Querying the Check Result of a Security Configuration Item
- Querying the Checklist of a Security Configuration Item
- Querying the List of Affected Servers of a Security Configuration Item
- Querying the Report of a Check Item in a Security Configuration Check
- Ignoring, Unignoring, Repairing, or Verifying the Failed Configuration Check Items
- Quota Management
- Container Management
- Event Management
- Intrusion Detection
- Server Management
-
Container Image
- Querying the Image List in the SWR Image Repository
- Scanning Images in the Image Repository in Batches
- Querying the Local Image List
- Querying Image Vulnerability Information
- CVE Information Corresponding to the Vulnerability
- Synchronizing the Image List from SWR
- Querying the List of Image Security Configuration Detection Results
- Querying the Check Item List of a Specified Security Configuration Item of an Image
- Querying the Mirror Configuration Check Report
- Policy Management
-
Vulnerability Management
- Querying the Vulnerability List
- Exporting Information About Vulnerabilities and Their Affected Servers
- Querying the Servers Affected by a Vulnerability
- Changing the Status of a Vulnerability
- Querying Vulnerability Information About a Server
- Creating a Vulnerability Scan Task
- Querying a Vulnerability Scan Policy
- Modifying a Vulnerability Scan Policy
- Querying the Vulnerability Scan Tasks
- Querying the List of Servers Corresponding to a Vulnerability Scan Task
- Querying Vulnerability Management Statistics
- Web Tamper Protection
- Tag Management
- Cluster Management
- Installation and Configuration
-
Asset Management
- Appendixes
- SDK Reference
-
FAQs
-
About HSS
- What Is Host Security?
- What Is Container Security?
- What Is Web Tamper Protection?
- What Are the Relationships Between Images, Containers, and Applications?
- How Do I Use HSS?
- Can HSS Protect Local IDC Servers?
- Is HSS in Conflict with Any Other Security Software?
- What Are the Differences Between HSS and WAF?
- Can HSS Be Used Across Accounts?
- What Is the HSS Agent?
- Can HSS Be Used Across Clouds?
- Does HSS Support Version Upgrade?
- Can HSS Automatically Detect and Remove Viruses?
-
Agent
- Do I Need to Install the HSS Agent After Purchasing HSS?
- Is the Agent in Conflict with Any Other Security Software?
- How Do I Uninstall the Agent?
- What Should I Do If Agent Installation Failed?
- How Do I Fix an Abnormal Agent?
- What Is the Default Agent Installation Path?
- How Many CPU and Memory Resources Are Occupied by the Agent When It Performs Scans?
- Do Different HSS Editions Share the Same Agent?
- How Do I View Servers Where No Agents Have Been Installed?
- How Do I Upgrade the Agent?
- What Do I Do If the HSS Upgrade Fails?
- What Resources Will Be Accessed by the Agent After It Is Installed on a Server?
- How Do I Use Images to Install Agents in Batches?
- What Do I Do If I Cannot Access the Download Link of the Windows Or Linux Agent?
- What Do I Do If Agent Upgrade Fails and the Message "File replacement failed" Is Displayed?
- What Can I Do If Agents Failed to Be Installed in Batches and a Message Is Displayed Indicating that the Network Is Disconnected?
- How Do I Verify the Connection Between My Server and the HSS Server?
- Protection
-
Vulnerability Management
- How Do I Fix Vulnerabilities?
- What Do I Do If an Alarm Still Exists After I Fixed a Vulnerability?
- Why a Server Displayed in Vulnerability Information Does Not Exist?
- Do I Need to Restart a Server After Its Vulnerabilities Are Fixed?
- Can I Check the Vulnerability and Baseline Fix History on HSS?
- What Do I Do If Vulnerability Fix Failed?
- Why Can't I Select a Server During Manual Vulnerability Scanning or Batch Vulnerability Fixing?
- What Do I Do If a Vulnerability Scan Failed?
- Do I Need to Subscribe to Ubuntu Pro to Fix Ubuntu Vulnerabilities?
-
Detection & Response
- How Do I View and Handle HSS Alarm Notifications?
- What Do I Do If My Servers Are Subjected to a Mining Attack?
- Why a Process Is Still Isolated After It Was Whitelisted?
- Why an Attack Is Not Detected by HSS?
- Can I Unblock an IP Address Blocked by HSS, and How?
- Why a Blocked IP Address Is Automatically Unblocked?
- How Often Is Malware Scan and Removal?
- How Often Are the HSS Virus Database and Vulnerability Database Updated?
- What Do I Do If an IP Address Is Blocked by HSS?
- How Do I Defend Against Ransomware Attacks?
- Why Can't I Receive Alarms After the HSS Is Upgraded?
- How Do I Add High-risk Command Execution Alarms to the Whitelist?
- Why Doesn't HSS Generate Alarms for Some Web Shell Files?
- Abnormal Logins
-
Brute-force Attack Defense
- How Does HSS Intercept Brute Force Attacks?
- How Do I Handle a Brute-force Attack Alarm?
- How Do I Defend Against Brute-force Attacks?
- How Do I Unblock an IP Address?
- What Do I Do If HSS Frequently Reports Brute-force Alarms?
- What Do I Do If a Huawei Cloud IP Address Trigger a Brute-force Attack Alarm?
- What Do I Do If the Port in Brute-force Attack Records Is Not Updated?
-
Baseline Inspection
- Why Are Weak Password Alarms Generated After the Weak Password Detection Policy Is Disabled?
- How Do I Install a PAM and Set a Proper Password Complexity Policy in a Linux OS?
- How Do I Set a Proper Password Complexity Policy in a Windows OS?
- How Do I Handle Unsafe Configurations?
- How Do I View Configuration Check Reports?
- How Do I Handle a Weak Password Alarm?
- How Do I Set a Secure Password?
-
Web Tamper Protection
- Why Do I Need to Add a Protected Directory?
- How Do I Modify a Protected Directory?
- What Should I Do If WTP Cannot Be Enabled?
- How Do I Modify a File After WTP Is Enabled?
- What Can I Do If I Enabled Dynamic WTP But Its Status Is Enabled but not in effect?
- What Are the Differences Between the Web Tamper Protection Functions of HSS and WAF?
-
Container Security
- How Do I Disable Node Protection?
- How Do I Switch from CGS to HSS?
- How Do I Enable Node Protection?
- How Do I Enable the API Server Audit for an On-Premises Kubernetes Container?
- What Do I Do If the Container Cluster Protection Plug-in Fails to Be Uninstalled?
- What Do I Do If the Cluster Connection Component (ANP-Agent) Failed to Be Deployed?
- What Do I Do If Cluster Permissions Are Abnormal?
- Failed to Upload the Image to the Private Image Repository
- What Do I Do If I Failed to Enable Protection for a CCE Cluster?
- Ransomware Prevention
- Region and AZ
-
Security Configurations
- How Do I Clear the SSH Login IP Address Whitelist Configured in HSS?
- What Can I Do If I Cannot Remotely Log In to a Server via SSH?
- How Do I Use 2FA?
- What Do I Do If I Cannot Enable 2FA?
- Why Can't I Receive a Verification Code After 2FA Is Enabled?
- Why Does My Login Fail After I Enable 2FA?
- How Do I Add a Mobile Number or Email Address for 2FA?
- Do I Use a Fixed Verification Code for 2FA?
- Will I Be Billed for Alarm Notifications and SMS?
- How Do I Modify Alarm Notification Recipients?
- Why No Topics Are Available for Me to Choose When I Configure Alarm Notifications?
- Can I Disable HSS Alarm Notifications?
- How Do I Modify Alarm Notification Items?
- How Do I Disable the SELinux Firewall?
-
Protection Quota
- How Do I Extend the Validity Period of HSS Quotas?
- How Do I Filter Unprotected Servers?
- Why Can't I Find the Servers I Purchased on the Console?
- What Do I Do If My Quotas Are Insufficient and I Failed to Enable Protection?
- How Do I Allocate My Quota?
- If I Change the OS of a Protected Server, Does It Affect My HSS Quota?
- Why Doesn't an HSS Edition Take Effect After Purchase?
- How Do I Change the Protection Quota Edition Bound to a Server?
- Can I Bind a Server to an HSS Quota If They Are in Different Enterprise Projects?
- Billing, Renewal, and Unsubscription
-
Others
- How Do I Use the Windows Remote Desktop Connection Tool to Connect to a Windows Server?
- How Do I Check HSS Log Files?
- How Do I Enable Logging for Login Failures?
- How Do I Clear an Alarm on Critical File Changes?
- Why Can't I View All Projects in the Enterprise Project Drop-down List?
- How Do I Enable or Disable HSS Self-protection?
- What Do I Do If Windows Self-Protection Cannot Be Disabled?
- Why Is a Deleted ECS Still Displayed in the HSS Server List?
-
About HSS
- Videos
-
More Documents
-
User Guide (Ankara Region)
- Introduction
- Enabling HSS
- Server Security Dashboard
- Asset Management
- Risk Prevention
- Prevention
- Intrusion Detection
- Security Operations
- Security Report
- Installation & Configuration
- Permissions Management
-
FAQs
-
About HSS
- What Is HSS?
- What Is Container Security Service?
- What Is Web Tamper Protection?
- What Are the Relationships Between Images, Containers, and Applications?
- How Do I Use HSS?
- Can HSS Protect Local IDC Servers?
- Is HSS in Conflict with Any Other Security Software?
- What Are the Differences Between HSS and WAF?
- What Is the HSS Agent?
-
Agent FAQs
- Is the Agent in Conflict with Any Other Security Software?
- How Do I Install the Agent?
- How Do I Uninstall the Agent?
- What Should I Do If Agent Installation Failed?
- How Do I Fix an Abnormal Agent?
- What Is the Default Agent Installation Path?
- How Many CPU and Memory Resources Are Occupied by the Agent When It Performs Scans?
- Do WTP and HSS Use the Same Agent?
- How Do I View Servers Where No Agents Have Been Installed?
-
Brute-force Attack Defense
- How Does HSS Intercept Brute Force Attacks?
- How Do I Handle a Brute-force Attack Alarm?
- How Do I Defend Against Brute-force Attacks?
- How Do I Do If the Account Cracking Prevention Function Does Not Take Effect on Some Linux Accounts?
- How Do I Unblock an IP Address?
- What Do I Do If HSS Frequently Reports Brute-force Alarms?
- What Do I Do If My Remote Server Port Is Not Updated in Brute-force Attack Records?
- Weak Passwords and Unsafe Accounts
-
Intrusions
- What Do I Do If My Servers Are Subjected to a Mining Attack?
- Why a Process Is Still Isolated After It Was Whitelisted?
- What Do I Do If a Mining Process Is Detected on a Server?
- Why Some Attacks on Servers Are Not Detected?
- Can I Unblock an IP Address Blocked by HSS, and How?
- Why a Blocked IP Address Is Automatically Unblocked?
- How Often Does HSS Detect, Isolate, and Kill Malicious Programs?
- What Do I Do If an IP Address Is Blocked by HSS?
- How Do I Defend Against Ransomware Attacks?
- Abnormal Logins
- Unsafe Settings
- Vulnerability Management
-
Web Tamper Protection
- Why Do I Need to Add a Protected Directory?
- How Do I Modify a Protected Directory?
- What Should I Do If WTP Cannot Be Enabled?
- How Do I Modify a File After WTP Is Enabled?
- What Can I Do If I Enabled Dynamic WTP But Its Status Is Enabled but not in effect?
- What Are the Differences Between the Web Tamper Protection Functions of HSS and WAF?
- Container Guard Service
- Ransomware Protection
-
Security Configurations
- How Do I Clear the SSH Login IP Address Whitelist Configured in HSS?
- What Can I Do If I Cannot Remotely Log In to a Server via SSH?
- How Do I Use 2FA?
- What Do I Do If I Cannot Enable 2FA?
- Why Can't I Receive a Verification Code After 2FA Is Enabled?
- Why Does My Login Fail After I Enable 2FA?
- How Do I Add a Mobile Phone Number or Email Address for Receiving 2FA Verification Notifications?
- If I Choose to Use Verification Code for 2FA, How Do I Get the Code?
- How Do I Disable the SELinux Firewall?
- Quotas
-
Others
- How Do I Use the Windows Remote Desktop Connection Tool to Connect to a Server?
- How Do I Check HSS Log Files?
- How Do I Enable Logging for Login Failures?
- How Do I Clear an Alarm on Critical File Changes?
- Is HSS Available as Offline Software?
- How Do I Enable HSS Self-Protection?
- What Do I Do If HSS Self-Protection Cannot Be Disabled?
-
About HSS
- Change History
-
User Guide (ME-Abu Dhabi Region)
- Introduction
- Enabling HSS
- Server Security Dashboard
- Asset Management
- Risk Prevention
-
Prevention
- Application Protection
- WTP
- Ransomware Prevention
- File Integrity Monitoring
-
Container Firewalls
- Container Firewall Overview
- Creating a Policy (for a Cluster Using the Container Tunnel Network Model)
- Creating a Policy (for a Cluster Using the VPC Network Model)
- Managing Policies (for a Cluster Using the Container Tunnel Network Model)
- Managing Policies (for a Cluster Using the VPC Network Model)
- Intrusion Detection
- Security Operations
- Security Report
- Installation & Configuration
- Audit
- Permissions Management
- Manually Upgrading HSS
-
FAQs
- About HSS
-
Agent FAQs
- Is the Agent in Conflict with Any Other Security Software?
- How Do I Uninstall the Agent?
- What Should I Do If Agent Installation Failed?
- How Do I Fix an Abnormal Agent?
- What Is the Default Agent Installation Path?
- How Many CPU and Memory Resources Are Occupied by the Agent When It Performs Scans?
- Do WTP and HSS Use the Same Agent?
- How Do I View Servers Where No Agents Have Been Installed?
- What Can I Do If the Agent Status Is Still "Not installed" After Installation?
- What Do I Do If the HSS Upgrade Fails?
-
Brute-force Attack Defense
- How Does HSS Intercept Brute Force Attacks?
- How Do I Handle a Brute-force Attack Alarm?
- How Do I Defend Against Brute-force Attacks?
- What Do I Do If the Account Cracking Prevention Function Does Not Take Effect on Some Accounts for Linux Servers?
- How Do I Unblock an IP Address?
- What Do I Do If HSS Frequently Reports Brute-force Alarms?
- What Do I Do If My Remote Server Port Is Not Updated in Brute-force Attack Records?
- Weak Passwords and Unsafe Accounts
-
Intrusions
- What Do I Do If My Servers Are Subjected to a Mining Attack?
- Why a Process Is Still Isolated After It Was Whitelisted?
- What Do I Do If a Mining Process Is Detected on a Server?
- Why Some Attacks on Servers Are Not Detected?
- Can I Unblock an IP Address Blocked by HSS, and How?
- Why a Blocked IP Address Is Automatically Unblocked?
- How Often Does HSS Detect, Isolate, and Kill Malicious Programs?
- What Do I Do If an IP Address Is Blocked by HSS?
- How Do I Defend Against Ransomware Attacks?
- Abnormal Logins
- Unsafe Settings
- Vulnerability Management
-
Web Tamper Protection
- Why Do I Need to Add a Protected Directory?
- How Do I Modify a Protected Directory?
- What Should I Do If WTP Cannot Be Enabled?
- How Do I Modify a File After WTP Is Enabled?
- What Can I Do If I Enabled Dynamic WTP But Its Status Is Enabled but not in effect?
- What Are the Differences Between the Web Tamper Protection Functions of HSS and WAF?
- Container Guard Service
-
Security Configurations
- What Can I Do If I Cannot Remotely Log In to a Server via SSH?
- How Do I Use 2FA?
- Why Can't I Receive a Verification Code After 2FA Is Enabled?
- Why Does My Login Fail After I Enable 2FA?
- How Do I Add a Mobile Phone Number or Email Address for Receiving 2FA Verification Notifications?
- How Do I Disable the SELinux Firewall?
- Others
- Change History
-
User Guide (Paris)
- Introduction
- Enabling HSS
- Server Security Dashboard
-
Asset Management
- Asset Management
- Server Fingerprints
- Container Fingerprints
- Server Management
- Container Management
- Risk Prevention
-
Prevention
- WTP
- Ransomware Prevention
- File Integrity Monitoring
-
Container Firewalls
- Container Firewall Overview
- Creating a Policy (for a Cluster Using the Container Tunnel Network Model)
- Creating a Policy (for a Cluster Using the VPC Network Model)
- Managing Policies (for a Cluster Using the Container Tunnel Network Model)
- Managing Policies (for a Cluster Using the VPC Network Model)
- Intrusion Detection
- Security Operations
- Security Report
- Installation & Configuration
- Audit
- Permissions Management
- Manually Upgrading HSS
-
FAQs
- About HSS
-
Agent FAQs
- Is the Agent in Conflict with Any Other Security Software?
- How Do I Uninstall the Agent?
- What Should I Do If Agent Installation Failed?
- How Do I Fix an Abnormal Agent?
- What Is the Default Agent Installation Path?
- How Many CPU and Memory Resources Are Occupied by the Agent When It Performs Scans?
- Do WTP and HSS Use the Same Agent?
- How Do I View Servers Where No Agents Have Been Installed?
- What Can I Do If the Agent Status Is Still "Not installed" After Installation?
- What Addresses Do ECSs Access After the Agent Is Installed?
-
Brute-force Attack Defense
- How Does HSS Intercept Brute Force Attacks?
- How Do I Handle a Brute-force Attack Alarm?
- How Do I Defend Against Brute-force Attacks?
- What Do I Do If the Account Cracking Prevention Function Does Not Take Effect on Some Accounts for Linux Servers?
- How Do I Unblock an IP Address?
- What Do I Do If HSS Frequently Reports Brute-force Alarms?
- What Do I Do If My Remote Server Port Is Not Updated in Brute-force Attack Records?
- Weak Passwords and Unsafe Accounts
-
Intrusions
- What Do I Do If My Servers Are Subjected to a Mining Attack?
- Why a Process Is Still Isolated After It Was Whitelisted?
- What Do I Do If a Mining Process Is Detected on a Server?
- Why Some Attacks on Servers Are Not Detected?
- Can I Unblock an IP Address Blocked by HSS, and How?
- Why a Blocked IP Address Is Automatically Unblocked?
- How Often Does HSS Detect, Isolate, and Kill Malicious Programs?
- What Do I Do If an IP Address Is Blocked by HSS?
- How Do I Defend Against Ransomware Attacks?
- Abnormal Logins
- Unsafe Settings
-
Vulnerability Management
- How Do I Fix Vulnerabilities?
- What Do I Do If an Alarm Still Exists After I Fixed a Vulnerability?
- Why a Server Displayed in Vulnerability Information Does Not Exist?
- Do I Need to Restart a Server After Fixing its Vulnerabilities?
- Can I Check the Vulnerability and Baseline Fix History on HSS?
- What Do I Do If Vulnerability Fix Failed?
- Why Can't I Select a Server During Manual Vulnerability Scanning or Batch Vulnerability Fixing?
-
Web Tamper Protection
- Why Do I Need to Add a Protected Directory?
- How Do I Modify a Protected Directory?
- What Should I Do If WTP Cannot Be Enabled?
- How Do I Modify a File After WTP Is Enabled?
- What Can I Do If I Enabled Dynamic WTP But Its Status Is Enabled but not in effect?
- What Are the Differences Between the Web Tamper Protection Functions of HSS and WAF?
- Container Guard Service
-
Security Configurations
- How Do I Clear the SSH Login IP Address Whitelist Configured in HSS?
- What Can I Do If I Cannot Remotely Log In to a Server via SSH?
- How Do I Use 2FA?
- What Do I Do If I Cannot Enable 2FA?
- Why Can't I Receive a Verification Code After 2FA Is Enabled?
- Why Does My Login Fail After I Enable 2FA?
- How Do I Add a Mobile Phone Number or Email Address for Receiving 2FA Verification Notifications?
- If I Choose to Use Verification Code for 2FA, How Do I Get the Code?
- How Do I Modify Alarm Notification Recipients?
- Why No Topics Are Available for Me to Choose When I Configure Alarm Notifications?
- Can I Disable HSS Alarm Notifications?
- How Do I Modify Alarm Notification Items?
- How Do I Disable the SELinux Firewall?
-
Others
- How Do I Use the Windows Remote Desktop Connection Tool to Connect to a Server?
- How Do I Check HSS Log Files?
- How Do I Enable Logging for Login Failures?
- How Do I Clear an Alarm on Critical File Changes?
- Is HSS Available as Offline Software?
- Why Is a Deleted ECS Still Displayed in the HSS Server List?
- Change History
-
User Guide (Ankara Region)
- General Reference
Copied.
How Do I Handle a Brute-force Attack Alarm?
- If a brute-force attack succeeded, take immediate measures to prevent attackers from further actions, such as breaching data, performing DDoS attacks, or implanting ransomware, miners, or Trojans.
- If a brute-force attack was blocked, take immediate measures to enhance your servers.
Mind map for troubleshooting
The following mind map describes how to handle a brute-force attack alarm.
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Handling the Alarm of a Successful Brute-force Attack
If you received an alarm notification indicating that your account had been cracked, you are advised to harden your servers as soon as possible.
- Log in to the management console.
- In the upper left corner of the page, click
, select a region, and choose Security > Host Security Service.
- Check whether the IP address that triggered the alarm is valid.
Choose Detection > Alarms. In the Event Types area, choose Abnormal User Behavior > Abnormal logins and check the login IP address.
- If the IP address is from a normal user (for example, who entered incorrect password for multiple times but logged in before their account is blocked), your server is not intruded. In this case, you can click Handle and ignore the event.
- If the IP address is invalid, your server may have been intruded.
In this case, mark this event as handled, log in to the intruded server, and change its password to a stronger one. For details, see How Do I Set a Secure Password?
- Check for and eliminate malicious programs.
Choose Malware > Malicious programs and check alarm events.
- If you find malicious programs implanted in your servers, locate them based on their process paths, users running them, and startup time.
To kill a malicious program in an alarm event, click Handle in the row of this event and select Isolate and kill.
- If you have confirmed that all the malicious program alarms are false, go to Step 8.
- If you find malicious programs implanted in your servers, locate them based on their process paths, users running them, and startup time.
- Check for suspicious account change records.
Choose Asset Management > Asset Fingerprints and click the Account Information tab. Detect suspicious account change records to prevent attackers from creating accounts or escalating account permissions (for example, adding login permissions to an account). For details, see Checking Operation History.
- Check and handle invalid accounts.
Choose Detection > Alarms. Choose Abnormal User Behavior > Invalid accounts to view and handle the invalid account alarms. For details, see Handling Server Alarms.
- Check for and fix unsafe settings.
Check for and fix weak password complexity policies and unsafe software settings on your servers. For details, see Suggestions on Fixing Unsafe Settings.
Handling the Alarm of a Blocked Brute-force Attack
If you have enabled HSS, HSS will protect your servers against brute-force attacks.
You can configure a login security policy to specify the brute force cracking determination mode and blocking duration. For details, see Login Security Check.
If you have not configured any login security detection policy, the following default login security policy is used: HSS will block an IP address if it has five or more brute-force attack attempts detected within 30 seconds, or 15 or more brute-force attack attempts detected within 3,600 seconds.
If you receive an alarm indicating that an attack source IP address is blocked, check whether the source IP address is a trusted IP address.
- Linux
On servers running the EulerOS with ARM, HSS does not block the IP addresses suspected of SSH brute-force attacks, but only generates alarms.
- Windows
- Authorize the Windows firewall when you enable protection for a Windows server. Do not disable the Windows firewall during the HSS in-service period. If the Windows firewall is disabled, HSS cannot block brute-force attack IP addresses.
- If the Windows firewall is manually enabled, HSS may also fail to block brute-force attack IP addresses.
Procedure
- Log in to the management console.
- In the upper left corner of the page, click
, select a region, and choose Security > Host Security Service.
- Choose Detection > Alarms. Choose Abnormal User Behavior > Brute-force attacks to view account brute force events.
Brute-force attack alarms will be generated if:
- The system uses weak passwords, is under brute-force attacks, and attacker IP addresses are blocked.
- Users fail to log in after several incorrect password attempts, and their IP addresses are blocked.
Figure 2 Brute-force attacks - Check whether the login IP address triggering the alarm is valid.
- If the IP address is valid,
- To handle a false alarm, click Handle in the row of the alarm event. Ignore or whitelist the IP address.
This does not unblock the IP address.
- To unblock the IP address, click View Details under Blocked IP Addresses, select the IP address, and unblock it. Alternatively, you can just wait for it to be automatically unblocked when its blocking duration expires.
By default, suspicious SSH attackers are blocked for 12 hours. Other types of suspicious attackers are blocked for 24 hours.
- To handle a false alarm, click Handle in the row of the alarm event. Ignore or whitelist the IP address.
- If the source IP address is invalid or unknown,
Immediately log in to your server and change your password to a stronger one.
- If the IP address is valid,
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