title: Why might the CIDR/IP in DB security group be different from instance elastic IP?
body: <p>I have an EC2 instance, which is able to connect to my RDS instance, yet its elastic IP does not appear in the DB security group of whitelisted IP's.</p>
  
  <p>How might this be?  </p>
  
  <p>I ask because I have created a new instance, which I also want to whitelist and just entering its elastic IP does not seem like the way to do things since none of the other servers have their elastic IP listed.</p>
  
  <p>Thanks in advance,</p>