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    Anti-DDoS:Public error codes

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    Anti-DDoS:Public error codes

    Last Updated:Nov 17, 2025

    Error codes

    HTTP status code

    Error code

    Error message

    Description

    Action
    400 CAS.NameRepeat Cert Name Repeat. Duplicate certificate name. diagnosis
    400 CcRuleExist The rule already exists. The cc rule already exists. diagnosis
    400 CDNDomainExist cdn domain is exist. The cdn domain name already exists. diagnosis
    400 CheckGmSwitch Before enabling only, you need to enable the national secret certificate You must turn on the switch that enables SM certificate-based verification before you can turn on the switch that allows access only from SM certificate-based clients. diagnosis
    400 CheckOnlySwitch Before disabling the certificate switch, you need to disable only You must turn off the switch that allows access only from SM certificate-based clients before you can turn off the switch that enables SM certificate-based verification. diagnosis
    400 DomainDoesNotMatchCert Domain Does Not Match Cert. The certificate uploaded by the domain name does not match the certificate in the certificate center. diagnosis
    400 DomainExist domain is already exist. Domain name already exists. diagnosis
    400 DomainNotExist domain not exist. Domain name does not exist diagnosis
    400 DomainNotExist Domain does not exist. Domain name does not exist diagnosis
    400 DomainOwnerError domain belong to other user. Domain name belongs to another user diagnosis
    400 DomainUnregister Domain Unregister. you must put on record for you domain. The domain name is not filed. diagnosis
    400 ElasticBizBandwidthOutRange Elastic business bandwidth is out of range. Invalid Elastic Clean Bandwidth diagnosis
    400 EngineParamError The same CC rules exist. The same CC rules exist. diagnosis
    400 ErrDdosOverseasSpecLimit Error DDoS spec limit. Specifications exceeded diagnosis
    400 ErrDdosSpecLimit Error ddos spec limit. Specifications exceeded diagnosis
    400 ErrNoProcessAuthority Err No Process Authority. No operation permission. diagnosis
    400 ErrorNoProcessAuthority Error No Process Authority. No resource operation permission. diagnosis
    400 ErrorUnknown ERR UNKNOWN. Unknown error. diagnosis
    400 ExceedElasticSpec reach elastic limit in spec diagnosis
    400 ExceedWebRuleLimit reach site limit in spec. The number of protected domain names exceeds the specification. diagnosis
    400 GaElasticBizBandwidthOutRange Elastic business bandwidth is out of range. Invalid Elastic Clean Bandwidth for MCA 2.0 diagnosis
    400 GlobalDomainNotExist domain not exist. The domain name does not exist. diagnosis
    400 InputParamsNotValid input params not valid. Incorrect input parameter diagnosis
    400 InstanceNotExist Instance not exist. Instance does not exist diagnosis
    400 InstanceNotExist no instance for process in db. Instance does not exist. diagnosis
    400 InstanceNotExpire Intance not expire. The instance does not expire and cannot be released. diagnosis
    400 IntegratedDomainNotExist integrated domain not exist. Domain name does not exist diagnosis
    400 InternalError An error occurred. Internal Error diagnosis
    400 InternalParamError out of range. Illegal parameter diagnosis
    400 InvalidDomain invalid domain. Invalid Domain Name diagnosis
    400 InvalidInstanceId Invalid Instance Id. instanceId does not exist. Invalid instance ID diagnosis
    400 InvalidInternalElasticBandwidth params out of range. The international high-security on/off elastic business parameters are incorrect. diagnosis
    400 InvalidIpAddress Failed to find the anti-DDoS IP address or origin IP address. Failed to find Anti-DDoS Pro IP address or origin IP address diagnosis
    400 InvalidIPV4Network Invalid ipv4 IP or Network. illegal ipv4 network segment diagnosis
    400 InvalidIpv4Param invalid ipv4 param. Invalid ipv4 parameter diagnosis
    400 InvalidIPV6Network Invalid Ipv6 IP or Network. Illegal IPV6 CIDR block diagnosis
    400 InvalidJsonParam decoding json failed. Invalid JSON parameter diagnosis
    400 InvalidL4RuleFrontPort Invalid l4rule front port. Invalid Layer 4 forwarding port. diagnosis
    400 InvalidLayer4AclMask Layer4 IP ACL mask set failed. The network segment format of the 4-layer black and white list is incorrect. diagnosis
    400 InvalidOverseasIPV4Network Invalid ipv4 IP or Network. illegal ipv4 network segment. diagnosis
    400 InvalidOverseasIPV6Network Invalid IPV6 IP or Network. Illegal IPV6 CIDR block diagnosis
    400 InvalidOverseasLayer4AclMask Layer4 IP ACL mask set failed. The network segment format of the 4-layer black and white list is incorrect. diagnosis
    400 InvalidPageSize Invalid Page Size. Paging parameter exceeds limit. diagnosis
    400 InvalidParameter.TagValue Invalid Parameter TagValue. Invalid tag value diagnosis
    400 InvalidParams invalid params. Invalid parameter diagnosis
    400 InvalidRealServer Invalid Real Server. invalid format. sourceIps can not be empty. invalid origin ip address diagnosis
    400 InvalidSchedulerRule Invalid Scheduler Rule. Mainland China Acceleration rule does not exist. Failed to create traffic scheduler scheduling rule diagnosis
    400 InvalidSchedulerRuleValueType Invalid Scheduler Rule Value Types. Invalid scheduler rule. diagnosis
    400 InvalidSourceIp Invalid Source Ip. Invalid origin IP address. diagnosis
    400 InvalidSwitch record is the last in default line, invalid to switch to inactive. Failed to switch scheduling rules. diagnosis
    400 InvalidWebRule invalid Web rule. Invalid forwarding rule. diagnosis
    400 Layer4AclMaskConflict Layer4 IP ACL mask conflict. Network segment conflict diagnosis
    400 Layer4NetworkError Layer4 IP ACL mask set faile. Failed to set the black and white list of layer 4 network segments. diagnosis
    400 Layer4PortRuleExist l4 rule port is exist. Create port rule already exists diagnosis
    400 Layer4ProxyNotEnabled l4 proxy not enabled Application layer protection is not enabled diagnosis
    400 Layer4ProxyPayloadRuleConflict l4 proxy payload rule conflict. Payload policy rule conflict diagnosis
    400 Layer4ProxyPayloadRuleOverLimit l4 proxy payload rules reached limit. Payload policy rule overrun diagnosis
    400 ModifyDomainMissParam domain http2https config without http proxy. Modify Domain Name Missing http2https Configuration diagnosis
    400 NetworkCountExceedLimit Layer4 IP ACL mask count reached limit. The number of network segments exceeds the specification. diagnosis
    400 NetworkRuleExist network rule port is exist. The rule already exists. diagnosis
    400 NoSupportNetwork Ip not support for ACL masks. Unsupported network segment diagnosis
    400 NoSupportOverseasNetwork Ip not support for ACL masks. The current IP address does not support black and white list network segment configuration. diagnosis
    400 NotAllowDelCDNDomain domain can't delete while cdn/dcdn cname exist. CDN/DCDN linkage configuration exists. Please delete the linkage configuration before deleting the domain name. diagnosis
    400 NotEffectLayer4Proxy l4 proxy not effect. Application layer protection does not take effect diagnosis
    400 NotSupportLayer4AclMask Layer4 IP ACL mask not support. Black and white list of unsupported 4-layer network segments. diagnosis
    400 NotSupportLayer4Proxy eip not support for l4 proxy. Application layer protection is not supported diagnosis
    400 OldRuleDeprecated ERR OLD CC RULE DEPRECATED. The old cc rule has been deprecated. diagnosis
    400 OverseasLayer4AclMaskConflict Layer4 IP ACL mask conflict. Network segment conflict diagnosis
    400 OverseasLayer4NetworkError Layer4 IP ACL mask set failed. Failed to set the black and white list of layer 4 network segments. diagnosis
    400 OverseasNetworkCountExceedLimit Layer4 IP ACL mask count reached limit. The number of network segments exceeds the specification. diagnosis
    400 OverseasNotSupportLayer4AclMask Layer4 IP ACL mask not support. Black and white list of unsupported 4-layer network segments. diagnosis
    400 ParamError out of range. Illegal parameter diagnosis
    400 ParamError param error. Parameter error diagnosis
    400 ParamsNotValid input params not valid. Incorrect input parameter diagnosis
    400 QueryDbFailed query db failed. Data does not exist. diagnosis
    400 QueryResourceFailed failed to query current resource. The corresponding resource could not be found. diagnosis
    400 ResourceNotValid resource not valid. Invalid resource diagnosis
    400 ReuseCnameError ERR REUSE CNAME NOT BELONGTO TO YOU. Incorrect reuse of cname. diagnosis
    400 SchedulerRuleError record priority conflict by different type. Scheduler different types of priority conflict. diagnosis
    400 SchedulerRuleParamError Scheduler rule param error. Scheduler parameter error. diagnosis
    400 SelbCallFailed selb central remote call failed. Failed to call Selb diagnosis
    400 ServerError server error. Server-side exception diagnosis
    400 SourceIpContainsOthersEcs Source ip contains others ecs. The origin IP address or domain name does not exist or the verification fails. diagnosis
    400 SubmitCertToCertCenterFailed Submit Cert To Cert Center Failed. Failed to upload the certificate to the certificate center. diagnosis
    400 UnknownError Unknown Error. Unknown error. diagnosis
    400 UnkownError unkown error. Not knowing the error. diagnosis
    400 CAS.NameRepeat Cert Name Repeat. Duplicate certificate name. diagnosis
    400 CcRuleExist The rule already exists. The cc rule already exists. diagnosis
    400 CDNDomainExist cdn domain is exist. The cdn domain name already exists. diagnosis
    400 CheckGmSwitch Before enabling only, you need to enable the national secret certificate You must turn on the switch that enables SM certificate-based verification before you can turn on the switch that allows access only from SM certificate-based clients. diagnosis
    400 CheckOnlySwitch Before disabling the certificate switch, you need to disable only You must turn off the switch that allows access only from SM certificate-based clients before you can turn off the switch that enables SM certificate-based verification. diagnosis
    400 DomainDoesNotMatchCert Domain Does Not Match Cert. The certificate uploaded by the domain name does not match the certificate in the certificate center. diagnosis
    400 DomainExist domain is already exist. Domain name already exists. diagnosis
    400 DomainNotExist domain not exist. Domain name does not exist diagnosis
    400 DomainNotExist Domain does not exist. Domain name does not exist diagnosis
    400 DomainOwnerError domain belong to other user. Domain name belongs to another user diagnosis
    400 DomainUnregister Domain Unregister. you must put on record for you domain. The domain name is not filed. diagnosis
    400 ElasticBizBandwidthOutRange Elastic business bandwidth is out of range. Invalid Elastic Clean Bandwidth diagnosis
    400 EngineParamError The same CC rules exist. The same CC rules exist. diagnosis
    400 ErrDdosOverseasSpecLimit Error DDoS spec limit. Specifications exceeded diagnosis
    400 ErrDdosSpecLimit Error ddos spec limit. Specifications exceeded diagnosis
    400 ErrNoProcessAuthority Err No Process Authority. No operation permission. diagnosis
    400 ErrorNoProcessAuthority Error No Process Authority. No resource operation permission. diagnosis
    400 ErrorUnknown ERR UNKNOWN. Unknown error. diagnosis
    400 ExceedElasticSpec reach elastic limit in spec diagnosis
    400 ExceedWebRuleLimit reach site limit in spec. The number of protected domain names exceeds the specification. diagnosis
    400 GaElasticBizBandwidthOutRange Elastic business bandwidth is out of range. Invalid Elastic Clean Bandwidth for MCA 2.0 diagnosis
    400 GlobalDomainNotExist domain not exist. The domain name does not exist. diagnosis
    400 InputParamsNotValid input params not valid. Incorrect input parameter diagnosis
    400 InstanceNotExist Instance not exist. Instance does not exist diagnosis
    400 InstanceNotExist no instance for process in db. Instance does not exist. diagnosis
    400 InstanceNotExpire Intance not expire. The instance does not expire and cannot be released. diagnosis
    400 IntegratedDomainNotExist integrated domain not exist. Domain name does not exist diagnosis
    400 InternalError An error occurred. Internal Error diagnosis
    400 InternalParamError out of range. Illegal parameter diagnosis
    400 InvalidDomain invalid domain. Invalid Domain Name diagnosis
    400 InvalidInstanceId Invalid Instance Id. instanceId does not exist. Invalid instance ID diagnosis
    400 InvalidInternalElasticBandwidth params out of range. The international high-security on/off elastic business parameters are incorrect. diagnosis
    400 InvalidIpAddress Failed to find the anti-DDoS IP address or origin IP address. Failed to find Anti-DDoS Pro IP address or origin IP address diagnosis
    400 InvalidIPV4Network Invalid ipv4 IP or Network. illegal ipv4 network segment diagnosis
    400 InvalidIpv4Param invalid ipv4 param. Invalid ipv4 parameter diagnosis
    400 InvalidIPV6Network Invalid Ipv6 IP or Network. Illegal IPV6 CIDR block diagnosis
    400 InvalidJsonParam decoding json failed. Invalid JSON parameter diagnosis
    400 InvalidL4RuleFrontPort Invalid l4rule front port. Invalid Layer 4 forwarding port. diagnosis
    400 InvalidLayer4AclMask Layer4 IP ACL mask set failed. The network segment format of the 4-layer black and white list is incorrect. diagnosis
    400 InvalidOverseasIPV4Network Invalid ipv4 IP or Network. illegal ipv4 network segment. diagnosis
    400 InvalidOverseasIPV6Network Invalid IPV6 IP or Network. Illegal IPV6 CIDR block diagnosis
    400 InvalidOverseasLayer4AclMask Layer4 IP ACL mask set failed. The network segment format of the 4-layer black and white list is incorrect. diagnosis
    400 InvalidPageSize Invalid Page Size. Paging parameter exceeds limit. diagnosis
    400 InvalidParameter.TagValue Invalid Parameter TagValue. Invalid tag value diagnosis
    400 InvalidParams invalid params. Invalid parameter diagnosis
    400 InvalidRealServer Invalid Real Server. invalid format. sourceIps can not be empty. invalid origin ip address diagnosis
    400 InvalidSchedulerRule Invalid Scheduler Rule. Mainland China Acceleration rule does not exist. Failed to create traffic scheduler scheduling rule diagnosis
    400 InvalidSchedulerRuleValueType Invalid Scheduler Rule Value Types. Invalid scheduler rule. diagnosis
    400 InvalidSourceIp Invalid Source Ip. Invalid origin IP address. diagnosis
    400 InvalidSwitch record is the last in default line, invalid to switch to inactive. Failed to switch scheduling rules. diagnosis
    400 InvalidWebRule invalid Web rule. Invalid forwarding rule. diagnosis
    400 Layer4AclMaskConflict Layer4 IP ACL mask conflict. Network segment conflict diagnosis
    400 Layer4NetworkError Layer4 IP ACL mask set faile. Failed to set the black and white list of layer 4 network segments. diagnosis
    400 Layer4PortRuleExist l4 rule port is exist. Create port rule already exists diagnosis
    400 Layer4ProxyNotEnabled l4 proxy not enabled Application layer protection is not enabled diagnosis
    400 Layer4ProxyPayloadRuleConflict l4 proxy payload rule conflict. Payload policy rule conflict diagnosis
    400 Layer4ProxyPayloadRuleOverLimit l4 proxy payload rules reached limit. Payload policy rule overrun diagnosis
    400 ModifyDomainMissParam domain http2https config without http proxy. Modify Domain Name Missing http2https Configuration diagnosis
    400 NetworkCountExceedLimit Layer4 IP ACL mask count reached limit. The number of network segments exceeds the specification. diagnosis
    400 NetworkRuleExist network rule port is exist. The rule already exists. diagnosis
    400 NoSupportNetwork Ip not support for ACL masks. Unsupported network segment diagnosis
    400 NoSupportOverseasNetwork Ip not support for ACL masks. The current IP address does not support black and white list network segment configuration. diagnosis
    400 NotAllowDelCDNDomain domain can't delete while cdn/dcdn cname exist. CDN/DCDN linkage configuration exists. Please delete the linkage configuration before deleting the domain name. diagnosis
    400 NotEffectLayer4Proxy l4 proxy not effect. Application layer protection does not take effect diagnosis
    400 NotSupportLayer4AclMask Layer4 IP ACL mask not support. Black and white list of unsupported 4-layer network segments. diagnosis
    400 NotSupportLayer4Proxy eip not support for l4 proxy. Application layer protection is not supported diagnosis
    400 OldRuleDeprecated ERR OLD CC RULE DEPRECATED. The old cc rule has been deprecated. diagnosis
    400 OverseasLayer4AclMaskConflict Layer4 IP ACL mask conflict. Network segment conflict diagnosis
    400 OverseasLayer4NetworkError Layer4 IP ACL mask set failed. Failed to set the black and white list of layer 4 network segments. diagnosis
    400 OverseasNetworkCountExceedLimit Layer4 IP ACL mask count reached limit. The number of network segments exceeds the specification. diagnosis
    400 OverseasNotSupportLayer4AclMask Layer4 IP ACL mask not support. Black and white list of unsupported 4-layer network segments. diagnosis
    400 ParamError out of range. Illegal parameter diagnosis
    400 ParamError param error. Parameter error diagnosis
    400 ParamsNotValid input params not valid. Incorrect input parameter diagnosis
    400 QueryDbFailed query db failed. Data does not exist. diagnosis
    400 QueryResourceFailed failed to query current resource. The corresponding resource could not be found. diagnosis
    400 ResourceNotValid resource not valid. Invalid resource diagnosis
    400 ReuseCnameError ERR REUSE CNAME NOT BELONGTO TO YOU. Incorrect reuse of cname. diagnosis
    400 SchedulerRuleError record priority conflict by different type. Scheduler different types of priority conflict. diagnosis
    400 SchedulerRuleParamError Scheduler rule param error. Scheduler parameter error. diagnosis
    400 SelbCallFailed selb central remote call failed. Failed to call Selb diagnosis
    400 ServerError server error. Server-side exception diagnosis
    400 SourceIpContainsOthersEcs Source ip contains others ecs. The origin IP address or domain name does not exist or the verification fails. diagnosis
    400 SubmitCertToCertCenterFailed Submit Cert To Cert Center Failed. Failed to upload the certificate to the certificate center. diagnosis
    400 UnknownError Unknown Error. Unknown error. diagnosis
    400 UnkownError unkown error. Not knowing the error. diagnosis