Force SSL on Amazon S3

Question

Is it possible (via IAM, bucket policy, or otherwise) to force Amazon S3 to only serve content over HTTPS/SSL and deny all regular, unencrypted HTTP access?

score 48 · Accepted Answer · edited Dec 04 '18 at 12:56

48

I believe this can be achieved using a bucket policy. Deny all HTTP requests to the bucket in question using the condition aws:SecureTransport: false.
The following is not tested but it should give you an idea of how to set it up for your case.

{
    "Statement":[
        {
            "Action": "s3:*",
            "Effect":"Deny",
            "Principal": "*",
            "Resource":"arn:aws:s3:::bucketname/*",
            "Condition":{
                "Bool":
                { "aws:SecureTransport": false }
            }
        }
    ]
}

edited Dec 04 '18 at 12:56

Yves M.

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answered Jan 13 '14 at 09:39

Okezie

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2

This didn't work for me, that is, I can still access http://my.website.com.s3-website-us-east-1.amazonaws.com, which is the S3 endpoint – Chris F Sep 07 '18 at 18:21
Wow, this actually worked really well. Much simpler than the AWS Policy Generator. Thanks! – Joshua Pinter Sep 08 '19 at 02:56

score 5 · Answer 2 · edited May 24 '17 at 10:54

Here you allow your incoming traffic but refuse the non SSL one. If you want to go back just remove the 2^nd statement:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "PublicReadGetObject",
            "Effect": "Allow",
            "Principal": {
                "AWS": "*"
            },
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::yourbucketnamehere/*"
        },
        {
            "Sid": "PublicReadGetObject",
            "Effect": "Deny",
            "Principal": {
                "AWS": "*"
            },
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::yourbucketnamehere/*",
            "Condition":{
                "Bool":
                { "aws:SecureTransport": false }
            }
        }
    ]
}

Don't forget to put your bucket name at yourbucketnamehere.

Now you need to install a SSL certificate. All the information can be found here.

I tried that; it simply blocks every access. – Arĥimedeς ℳontegasppα ℭacilhας Sep 15 '22 at 11:55 — Arĥimedeς ℳontegasppα ℭacilhας, Sep 15 '22 at 11:55

Force SSL on Amazon S3

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