title: How to disable port access from other AWS regions inside AWS security group
body: <p>I would like to create simple rule in AWS security group which would, by default, enable access to specific port ONLY to the instances running in specific AWS region (for example: us-east-1).
  I know that security groups are tied to specific AWS region and with that assumption, I thought there is some straightforward way to create rule in security group for specific port which would disable access for requests coming from instances in other AWS regions.</p>
  
  <p>While google-ing around, I've found a list of ip ranges for specific regions on AWS: <a href="https://ip-ranges.amazonaws.com/ip-ranges.json" rel="nofollow noreferrer">https://ip-ranges.amazonaws.com/ip-ranges.json</a> but list is not small so adding list of all ip ranges for specific region would be my last resort.</p>
  
  <p>Thanks in advance.</p>