Created
October 22, 2020 01:06
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Analyze AWS VPC flow logs with Athena
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# Export log format: | |
# ${version} ${account-id} ${interface-id} ${srcaddr} ${dstaddr} ${srcport} ${dstport} ${protocol} ${packets} ${bytes} ${start} ${end} ${action} ${log-status} ${vpc-id} ${subnet-id} ${instance-id} ${tcp-flags} ${type} ${pkt-srcaddr} ${pkt-dstaddr | |
CREATE EXTERNAL TABLE IF NOT EXISTS vpc_flow_logs_myawsaccount ( | |
version int, | |
account string, | |
interfaceid string, | |
sourceaddress string, | |
destinationaddress string, | |
sourceport int, | |
destinationport int, | |
protocol int, | |
numpackets int, | |
numbytes bigint, | |
starttime int, | |
endtime int, | |
action string, | |
logstatus string, | |
vpcid string, | |
subnetid string, | |
instanceid string, | |
tcpflags int, | |
traffictype string, | |
packetsourceaddress string, | |
packetdestinationaddress string | |
) | |
PARTITIONED BY (dt string) | |
ROW FORMAT DELIMITED | |
FIELDS TERMINATED BY ' ' | |
LOCATION 's3://your-vpc-flow-logs-s3-bucket/AWSLogs/<aws account id>/vpcflowlogs/us-east-1/' | |
TBLPROPERTIES ("skip.header.line.count"="1"); | |
# Create Partition | |
ALTER TABLE vpc_flow_logs_myawsaccount | |
ADD PARTITION (dt='2020-10-20') | |
location 's3://your-vpc-flow-logs-s3-bucket/AWSLogs/<aws account id>/vpcflowlogs/us-east-1/2020/10/20'; | |
# Sample Queries | |
SELECT dt,SUM(numbytes) AS bytecount, SUM(numpackets) AS packetcount, sourceaddress, sourceport, destinationaddress, destinationport | |
FROM vpc_flow_logs_myawsaccount WHERE action='REJECT' | |
GROUP BY dt,sourceaddress,sourceport,destinationaddress,destinationport | |
ORDER BY bytecount DESC | |
Limit 50; | |
SELECT dt,SUM(numbytes) AS bytecount, SUM(numpackets) AS packetcount, sourceaddress, destinationaddress, destinationport | |
FROM vpc_flow_logs_myawsaccount WHERE action='ACCEPT' AND destinationport=22 | |
GROUP BY dt,sourceaddress,destinationaddress,destinationport | |
ORDER BY bytecount DESC | |
Limit 500; | |
SELECT dt,sourceaddress, sourceport,destinationaddress, destinationport | |
FROM vpc_flow_logs_myawsaccount WHERE action='ACCEPT' AND destinationaddress LIKE '8.8.%.%' | |
GROUP BY dt,sourceaddress,sourceport,destinationaddress, destinationport | |
Limit 1000; |
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