AWS VPC flowlogs CloudWatch logs CloudTrail logs and filters examples
Official Documentations - https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/FilterAndPatternSyntax.html
Basic sample VPC-flow-logs
[version, account, eni, source, destination, srcport, destport="8000", protocol, packets, bytes, windowstart, windowend, action, flowlogstatus]
VPC flow logs example with combination of AND
[version, account, eni, source="185.2*", destination, (srcport!="80" && srcport!="443"), (destport!="80" && destport!="443"), protocol, packets, bytes, windowstart, windowend, action, flowlogstatus]
Basic Expressions Operators
= – EQUAL
!= – NOT EQUAL
< – SMALL THAN
> – GRATER THEN
<= – SMALL OR EQUAL
>= – GRATER OR EQUAL
&& – AND
|| – OR
Cloud Trail Logs Filter examples
- filter by Failure Console Logins ‘ConsoleLogin=”Failure”’
{ $.eventSource = "signin.amazonaws.com" && $.responseElements.ConsoleLogin = "Failure" }
- exclude know IP address
{ ($.sourceIPAddress != "52.123.123.5") && ($.sourceIPAddress != "33.123.123.*") && ($.sourceIPAddress != "*.amazonaws.com") }
- AWS login without using MFA
{ $.eventSource="signin.amazonaws.com" && $.additionalEventData.MFAUsed="No" }
Happy learning