Lambda - not connected to VPC - has no internet access

Question

Hello,

I have created a lambda-function, but it seems to have no internet access.
So, I created a new function, just doing a ping.
`        socket.create_connection((host_to_ping, 80), timeout=timeout)
        response = {
            'statusCode': 200,
            'body': f'Ping successful {host_to_ping}'
        }`

This always runs into an exception (timeout).
I have assigned the AWSLambdaBasicExecutionRole to this lambda.

I had yesterday played around a lot with my VPCs, Subnets, ... and maybe I messed up.
But this Lambda is NOT connected to a VPC - so I understand it should have internet access by default?

What could be wrong?

Greetings,
Hendrik

Accepted Answer

Hello.

Looking at the explanation below, I thought that it was not possible to send ICMP packets from Lambda.  
Therefore, I think it is probably not possible to ping from Lambda.  
https://aws.amazon.com/lambda/faqs/?nc1=h_ls  
> Q: What restrictions apply to AWS Lambda function code?
> Lambda attempts to impose as few restrictions as possible on normal language and operating system activities, but there are a few activities that are disabled: Inbound network connections are blocked by AWS Lambda, and for outbound connections, only TCP/IP and UDP/IP sockets are supported, and ptrace (debugging) system calls are blocked. TCP port 25 traffic is also blocked as an anti-spam measure.

Answer

Thanks a lot, that explains it!

Lambda - not connected to VPC - has no internet access

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