# Anti-Bot Blade generates error logs with the reason "Failed to Decrypt CP Site Response"

**Product**: Anti-Bot  
**Version**: R80.40 (EOS), R81 (EOS), R81.10 (EOS), R81.20  
**OS**: Gaia  
**Last Modified**: 2025-05-01

## Symptoms

- SmartConsole shows these Anti-Bot logs:

- **Log Info**:
    - Blade: `Anti-Bot`
    - Product Family: `Threat`
    - Type: `System Alert`
  - **Forensics Details**:
    - Description: `Error occur while accessing:<URL>`
    - Reason: `Failed to Decrypt CP Site Response., check /opt/CPSuite-<VERSION>/fw1///log/rad_events/Errors/flow_<NUMBER> For more details`

Example:

- There are RAD log files in the `$FWDIR/log/rad_events/Errors/` directory on the Security Gateway.

- RAD error logs (`$FWDIR/log/rad_events/Errors/flow_<NUMBER>`) contain lines like these:

```
[rad_decrypted_response_task.cpp:134] CRadDecryptedResponseTask::decrypt: [ERROR] response size is 1030496' code limit to 1000000

[rad_decrypted_response_task.cpp:80] CRadDecryptedResponseTask::getResponseString: [ERROR]  failed to decrypt response 0xdc21b440

[rad_response_task.cpp:67] CRadResponseTask::run: [ERROR] can not get response string
```

## Cause

The RAD decrypt function cannot handle a payload larger than 1,000,000 bytes.

Because of that, the response from ThreatCloud cannot be decrypted, the Anti-Bot Software Blade cannot properly analyze its content and shows an error.

## Solution

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#### NOTE

This solution has been verified for the specific scenario, described by the combination of Product, Version and Symptoms. It may not work in other scenarios.

## Article Properties

**Access Level**: Advanced  
**Status**: Approved by TAC  
**Date Created**: 2024-07-25  
**Last Modified**: 2025-05-01