What are the naming requirements for an S3 bucket?
The following rules apply for naming buckets in Amazon S3:
- Bucket names must be between 3 and 63 characters long.
- Bucket names can consist only of lowercase letters, numbers, dots (.), and hyphens (-).
- Bucket names must begin and end with a letter or number.
Are AWS S3 bucket names case sensitive?
S3 bucket names are case sensitive. Due to this mismatch, there is no URL by which you can access a bucket with capital letters in the name, so we set the URL for these buckets to be empty.
Do S3 buckets have to be unique?
An Amazon S3 bucket name is globally unique, and the namespace is shared by all AWS accounts. This means that after a bucket is created, the name of that bucket cannot be used by another AWS account in any AWS Region until the bucket is deleted.
What is the security of an AWS S3 bucket?
The most important security configuration of an S3 bucket is the bucket policy. It defines which AWS accounts, IAM users, IAM roles and AWS services will have access to the files in the bucket (including anonymous access ) and under which conditions. Pro tip: you should remove public access from all your S3 buckets unless it’s necessary.
Is it best to restrict access to S3 buckets?
Restrict access to your S3 resources. By default, all S3 buckets are private and can be accessed only by users that are explicitly granted access. When using AWS, it’s a best practice to restrict access to your resources to the people that absolutely need it. Follow the principle of least privilege.
Who are some notable breaches of S3 buckets?
Some notable S3 bucket-related breaches in the past include FedEx , Verizon , Dow Jones, and even WWE. Such breaches were avoidable because AWS is designed to be highly-secure, if configured properly.
Which is the DNS entry for S3 buckets?
All S3 buckets share a global naming scheme. Bucket enumeration is not avoidable. All S3 buckets have a DNS entry: [bucketname].s3.amazonaws.com