# 故障反馈
- **[高防IP卡顿、延迟、访问不通等问题排查](https://support.huaweicloud.com/aad_faq/aad_01_0186.html)**   
- **[配置高防后访问网站提示504错误](https://support.huaweicloud.com/aad_faq/aad_01_0187.html)**   
- **[如何判断遭受的攻击类型？](https://support.huaweicloud.com/aad_faq/aad_01_0188.html)**   
- **[防护域名开启"WEB基础防护"之后，如何排查500/502/504错误？](https://support.huaweicloud.com/aad_faq/aad_01_0189.html)**   
- **[配置转发规则失败原因排查](https://support.huaweicloud.com/aad_faq/aad_01_0191.html)**   
- **[UDP封禁原因排查](https://support.huaweicloud.com/aad_faq/aad_01_0192.html)**   
- **[DDoS高防+WAF联动，添加WAF CNAME提示域名错误](https://support.huaweicloud.com/aad_faq/aad_01_0193.html)**   
- **[服务器IP流量过高被自动封堵后，如何解封？](https://support.huaweicloud.com/aad_faq/aad_01_0194.html)**   
- **[防护域名修改源站IP后，接入状态一直为失败，如何处理？](https://support.huaweicloud.com/aad_faq/aad_01_0248.html)**   
- **[配置转发规则时为什么某些端口配置失败？](https://support.huaweicloud.com/aad_faq/aad_01_0320.html)**   
- **[域名接入高防后出现"Received fatal alert"报错](https://support.huaweicloud.com/aad_faq/aad_01_0315.html)**