Rules: HTTP CloudFlare Protocol Violation or Empty Response
Error code 520 is used as a catch-all status when the origin server returns something that is unexpected, not tolerated, or not interpreted. This can include protocol violations and empty responses.
| Detail | Value |
|---|---|
| Type | Match |
| Category | Unknown/Other |
| Apply Risk to Entities | device_ip, srcDevice_ip, dstDevice_ip, device_hostname, srcDevice_hostname, dstDevice_hostname |
| Signal Name | HTTP CloudFlare Protocol Violation or Empty Response |
| Summary Expression | HTTP 502 Response from IP: {{srcDevice_ip}} to IP: {{dstDevice_ip}} |
| Score/Severity | Static: 1 |
| Enabled by Default | False |
| Prototype | False |
| Tags | _mitreAttackTactic:TA0001, _mitreAttackTechnique:T1190 |
- Amazon AWS - CloudFront
- Bro - Bro
- Cisco Systems - Umbrella
- Cloudflare - Logpush
- McAfee - Web Gateway
- Microsoft - Azure
- Sophos - UTM 9
| Origin | Field |
|---|---|
| Normalized Schema | device_hostname |
| Normalized Schema | device_ip |
| Normalized Schema | dstDevice_hostname |
| Normalized Schema | dstDevice_ip |
| Normalized Schema | http_response_statusCode |
| Normalized Schema | srcDevice_hostname |
| Normalized Schema | srcDevice_ip |