# CloudWatch Contributor Insights rule examples
<a name="ContributorInsights-Rule-Examples"></a>

This section contains examples that illustrate use cases for Contributor Insights rules.

**VPC Flow Logs: Byte transfers by source and destination IP address**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "LogGroupNames": [
        "/aws/containerinsights/sample-cluster-name/flowlogs"
    ],
    "LogFormat": "CLF",
    "Fields": {
        "4": "srcaddr",
        "5": "dstaddr",
        "10": "bytes"
    },
    "Contribution": {
        "Keys": [
            "srcaddr",
            "dstaddr"
        ],
        "ValueOf": "bytes",
        "Filters": []
    },
    "AggregateOn": "Sum"
}
```

**VPC Flow Logs: Highest number of HTTPS requests**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "LogGroupNames": [
        "/aws/containerinsights/sample-cluster-name/flowlogs"
    ],
    "LogFormat": "CLF",
    "Fields": {
        "5": "destination address",
        "7": "destination port",
        "9": "packet count"
    },
    "Contribution": {
        "Keys": [
            "destination address"
        ],
        "ValueOf": "packet count",
        "Filters": [
            {
                "Match": "destination port",
                "EqualTo": 443
            }
        ]
    },
    "AggregateOn": "Sum"
}
```

**VPC Flow Logs: Rejected TCP connections**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "LogGroupNames": [
        "/aws/containerinsights/sample-cluster-name/flowlogs"
    ],
    "LogFormat": "CLF",
    "Fields": {
        "3": "interfaceID",
        "4": "sourceAddress",
        "8": "protocol",
        "13": "action"
    },
    "Contribution": {
        "Keys": [
            "interfaceID",
            "sourceAddress"
        ],
        "Filters": [
            {
                "Match": "protocol",
                "EqualTo": 6
            },
            {
                "Match": "action",
                "In": [
                    "REJECT"
                ]
            }
        ]
    },
    "AggregateOn": "Sum"
}
```

**Route 53 NXDomain responses by source address**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "AggregateOn": "Count",
    "Contribution": {
        "Filters": [
            {
                "Match": "$.rcode",
                "StartsWith": [
                    "NXDOMAIN"
                ]
            }
        ],
        "Keys": [
            "$.srcaddr"
        ]
    },
    "LogFormat": "JSON",
    "LogGroupNames": [
        "<loggroupname>"
    ]
}
```

**Route 53 resolver queries by domain name**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "AggregateOn": "Count",
    "Contribution": {
        "Filters": [],
        "Keys": [
            "$.query_name"
        ]
    },
    "LogFormat": "JSON",
    "LogGroupNames": [
        "<loggroupname>"
    ]
}
```

**Route 53 resolver queries by query type and source address**

```
{
    "Schema": {
        "Name": "CloudWatchLogRule",
        "Version": 1
    },
    "AggregateOn": "Count",
    "Contribution": {
        "Filters": [],
        "Keys": [
            "$.query_type",
            "$.srcaddr"
        ]
    },
    "LogFormat": "JSON",
    "LogGroupNames": [
        "<loggroupname>"
    ]
}
```