Disabling firewalld on AWS?

Michael Hampton error at ioerror.us
Wed Sep 11 03:45:51 UTC 2013


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On 09/10/2013 11:36 PM, Sam Kottler wrote:
> Given the deny-by-default nature of security groups I think it makes sense to disable firewalld in the AMI's. I haven't seen any other AMI's that have a firewall enabled by default and we probably shouldn't break that pattern IMO.
>
> Thoughts?
>

This is easily one of my least-favorite "features" of certain Linux distributions.

Debian/Ubuntu images don't have a firewall enabled by default in their cloud images because they don't have a firewall enabled at all in a default installation. At least the last time I looked at them; maybe they've gotten smarter in the last couple of years.

I'm not really sure I see a benefit here. There may not even be a second firewall in front of the virtual machine; a user might turn it off because it's getting in the way, or a cloud provider might not provide this feature at all. I know of at least one public cloud provider which has an external firewall feature similar to AWS security groups, but it's off by default. In this case I see plenty of downside.
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