One of the most common queries we get from our AWS customers is something along the lines of “how to find resource with unknown IP addresses in VPC?” We can help you with this!

As a part of our AWS Support Services, we often receive similar requests from our AWS customers.

Today, let’s see the steps followed by our Support Techs to help our customers to find resources that own unknown IP addresses in Amazon Virtual Private Cloud (Amazon VPC).

 

Resource with unknown IP addresses in VPC

 
In Amazon VPC, several resources can create elastic network interfaces. We can find this network interface that owns an IP address by following the below steps:

1. Firstly, log in to the Amazon Management Console and then open the Amazon EC2 console.

2. Select Network Interfaces.

3. Then click in the search box and select Private IP.

4. After that enter the IP address in the search box. The list of network interfaces that meet our search will display.

5. Now we can find the resources that own the IP by checking the Description of the network interface.

6. We can also find the network interface that owns an IP address using the AWS CLI.

aws ec2 describe-network-interfaces --filters Name=addresses.private-ip-address,Values=IPv4 address

Here, we need to replace the IPv4 address with the IP address that we are checking. Also, be sure to specify  Region with the –region parameter.

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Conclusion

 
To conclude, today we discussed the steps followed by our Support Engineers to help our customers to find resources with unknown IP addresses in Amazon VPC.