- Release Notes and Announcements
- Product Introduction
- Comparison of Anti-DDoS Solutions
- Purchase Guide
- Getting Started
- Operation Guide
- Practical Tutorial
- Remote Protection Scheme with Anti-DDoS Pro
- Using Anti-DDoS Pro Together with WFA
- Suggestions on Stress Tests
- Solutions to Real Server IP Exposure
- Creating an Anti-DDoS EIP
- Configuration Directions and Notes on CC Protection Policies
- Syncing Forwarding Rules to New Anti-DDoS Advanced Instances
- Smart Scheduling of CTCC/CUCC/CMCC Traffic
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Anti-DDoS Advanced Instance APIs
- Resource List APIs
- Protection Configuration APIs
- CreateBlackWhiteIpList
- CreateCcBlackWhiteIpList
- CreateCcGeoIPBlockConfig
- CreateDDoSAI
- CreateDDoSGeoIPBlockConfig
- CreateDDoSSpeedLimitConfig
- CreatePacketFilterConfig
- CreateProtocolBlockConfig
- CreateWaterPrintConfig
- CreateWaterPrintKey
- DeleteCcBlackWhiteIpList
- DeleteCcGeoIPBlockConfig
- DeleteDDoSGeoIPBlockConfig
- DeleteDDoSSpeedLimitConfig
- DeletePacketFilterConfig
- DeleteWaterPrintConfig
- DeleteWaterPrintKey
- DescribeCcBlackWhiteIpList
- DescribeCcGeoIPBlockConfigList
- DescribeListBlackWhiteIpList
- DescribeListDDoSAI
- DescribeListDDoSGeoIPBlockConfig
- DescribeListDDoSSpeedLimitConfig
- DescribeListPacketFilterConfig
- DescribeListProtocolBlockConfig
- DescribeListWaterPrintConfig
- ModifyCcBlackWhiteIpList
- ModifyDDoSGeoIPBlockConfig
- ModifyDDoSSpeedLimitConfig
- ModifyPacketFilterConfig
- SwitchWaterPrintConfig
- Other APIs
- Alarm Notification APIs
- Connection Configuration APIs
- Intelligent Scheduling APIs
- Statistical Report APIs
- Data Types
- Error Codes
- FAQs
- Product Policy
- Glossary
- Release Notes and Announcements
- Product Introduction
- Comparison of Anti-DDoS Solutions
- Purchase Guide
- Getting Started
- Operation Guide
- Practical Tutorial
- Remote Protection Scheme with Anti-DDoS Pro
- Using Anti-DDoS Pro Together with WFA
- Suggestions on Stress Tests
- Solutions to Real Server IP Exposure
- Creating an Anti-DDoS EIP
- Configuration Directions and Notes on CC Protection Policies
- Syncing Forwarding Rules to New Anti-DDoS Advanced Instances
- Smart Scheduling of CTCC/CUCC/CMCC Traffic
- Troubleshooting
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Anti-DDoS Advanced Instance APIs
- Resource List APIs
- Protection Configuration APIs
- CreateBlackWhiteIpList
- CreateCcBlackWhiteIpList
- CreateCcGeoIPBlockConfig
- CreateDDoSAI
- CreateDDoSGeoIPBlockConfig
- CreateDDoSSpeedLimitConfig
- CreatePacketFilterConfig
- CreateProtocolBlockConfig
- CreateWaterPrintConfig
- CreateWaterPrintKey
- DeleteCcBlackWhiteIpList
- DeleteCcGeoIPBlockConfig
- DeleteDDoSGeoIPBlockConfig
- DeleteDDoSSpeedLimitConfig
- DeletePacketFilterConfig
- DeleteWaterPrintConfig
- DeleteWaterPrintKey
- DescribeCcBlackWhiteIpList
- DescribeCcGeoIPBlockConfigList
- DescribeListBlackWhiteIpList
- DescribeListDDoSAI
- DescribeListDDoSGeoIPBlockConfig
- DescribeListDDoSSpeedLimitConfig
- DescribeListPacketFilterConfig
- DescribeListProtocolBlockConfig
- DescribeListWaterPrintConfig
- ModifyCcBlackWhiteIpList
- ModifyDDoSGeoIPBlockConfig
- ModifyDDoSSpeedLimitConfig
- ModifyPacketFilterConfig
- SwitchWaterPrintConfig
- Other APIs
- Alarm Notification APIs
- Connection Configuration APIs
- Intelligent Scheduling APIs
- Statistical Report APIs
- Data Types
- Error Codes
- FAQs
- Product Policy
- Glossary
Anti-DDoS supports blocking the source traffic accessing Anti-DDoS instances based on specified protocols, such as ICMP, TCP, and UDP. Requests over the specified protocols are blocked directly.
UDP is a connectionless protocol, which is vulnerable to attacks. It's recommended to block UDP requests unless necessary.
Directions
1. Log in to the Anti-DDoS console and click DDoS Protection on the left sidebar.
2. Select an Anti-DDoS instance ID in the list on the left, such as "bgp-00xxxxxx".
3. In the Protocol blocking section, click Set.
4. On the pop-up page, click 
Yes
No
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