CODEWITHSUNDEEP
cdngoogle-cloud-storagegoogle-cdn
Tom Fishman
Tom Fishman

Reputation: 1826

How to disable google cloud storage bucket list from acl control?

We're using google cloud storage as our CDN.

However, any visitors can list all files by typing: http://ourcdn.storage.googleapis.com/

How to disable it while all the files under the bucket is still public readable by default?

We previously set the acl using 

gsutil defacl ch -g AllUsers:READ

Upvotes: 17

Views: 12134

Answers (5)

user8787347
user8787347

Reputation:

If you're using the bucket for a static website (or not), you can tell (using gsutil) GCP Cloud Storage what file to use as the "index" file, so that the XML file listing all the contents isn't shown, and instead your index.html file. See https://cloud.google.com/storage/docs/gsutil/commands/web

Upvotes: 0

Brandon Yarbrough
Brandon Yarbrough

Reputation: 38389

Your defacl looks good. The problem is most likely that for some reason AllUsers must also have READ, WRITE, or FULL_CONTROL on the bucket itself. You can clear those with a command like this: 

gsutil acl ch -d AllUsers gs://bucketname

Upvotes: 4

Hao Xu
Hao Xu

Reputation: 696

In GCP dashboard：

  1. get in your bucket
  2. click "Permissions" tab and get in.
  3. in member list find "allUsers", change role from Storage Object Viewer to Storage Legacy Object Reader

then, listing should be disabled.

Update:

as @Devy comment, just check the note below here

Note: roles/storage.objectViewer includes permission to list the objects in the bucket. If you don't want to grant listing publicly, use roles/storage.legacyObjectReader.

Upvotes: 62

maxime
maxime

Reputation: 2315

Upload an empty index.html file in the root of your bucket. Open the bucket settings and click Edit website configuration - set index.html as the Main Page.

It will prevent the listing of the directory.

Upvotes: 7

Travis Hobrla
Travis Hobrla

Reputation: 5509

Your command set the default object ACL on the bucket to READ, which means that objects will be accessible by anyone. To prevent users from listing the objects, you need to make sure users don't have an ACL on the bucket itself.

gsutil acl ch -d AllUsers gs://yourbucket

should accomplish this. You may need to run a similar command for AllAuthenticatedUsers; just take a look at the bucket ACL with

gsutil acl get gs://yourbucket

and it should be clear.

Upvotes: 2

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