Parsing at Broker VM level

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Parsing at Broker VM level

L1 Bithead

I'm using COLLECT parsing rule to manipulate data at broker VM level before ingestion

 Rule basically filters out on raw log that I generate specific to my test like some log line that contains text criticalevent along with some date and random machine name.

[Collect: vendor="unknown", product="unknown", target_broker=(mybroker), no_hit=drop]

filter _raw_log contains "criticalevent"

|alter a= someregex fn

|alter b=someregex fn

[Ingest:vendor="unknown", product="unknown", target_dataset="my_parsed_logs", no_hit=drop]

fields a,b,c ..

 

Now the resulting dataset gets all data and not the filtered data. If I put same filter condition inside ingest section then it works. But does that mean it happened at broker vm or at xdr side..

 

Is there something missing her

Coz, If I directly do Ingest without doing collect  and directly into the same dataset then it gives desired result. But I don't think it happens at broker. Like for e.g.

 

[Ingest:vendor="unknown", product="unknown", target_dataset="unknown_unknown_raw", no_hit=drop]

Filter _raw_log contains "criticalevent"

 

 

Am i missing something here in understanding it??

 

 

1 REPLY 1

L5 Sessionator

Hello @Fm12345 ,

 

Thank you for reaching out on Live community.

 

Would like to clarify few things first of all.

Ingest: An INGEST section is used to define the resulting dataset.

https://docs-cortex.paloaltonetworks.com/r/Cortex-XDR/Cortex-XDR-Pro-Administrator-Guide/INGEST

 

Collect: A COLLECT section defines a rule that enables data reduction and data manipulation at the Broker VM to help avoid sending unnecessary data to the Cortex XDR server and reduces traffic, storage, and computing costs.

https://docs-cortex.paloaltonetworks.com/r/Cortex-XDR/Cortex-XDR-Pro-Administrator-Guide/COLLECT

 

Below is the sample which you can refer and correct your query as per the need.

[COLLECT:vendor="Apache", product="ApacheServer", target_brokers = (bvm1, bvm2, bvm3), no_hit = drop]
alter source_log = json_extract_scalar(_raw_log, "$.source")
| filter source_log = "WebApp-Logs"
| fields source_log, _raw_log;
[INGEST:vendor="Apache", product="ApacheServer", target_dataset = "dvwa_application_log"]
alter log_timestamp = json_extract_scalar(_raw_log, "$.timestamp")
| alter log_msg = json_extract_scalar(_raw_log, "$.msg")
| alter log_remote_ip = json_extract_scalar(_raw_log, "$.Remote_IP")
| alter scanned_ip = json_extract_scalar(_raw_log, "$.Scanned_IP")
| fields log_msg ,log_remote_ip ,log_timestamp ,source_log ,scanned_ip , _raw_log;

 

Incase any further assistance is required, please feel free to reach out.

 

Regards

Ashutosh Patil
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