title: What changes after AWS instance is stopped then restarted
body: <p>We have received a "instances scheduled for retirement" notification form AWS.
  It will affect our principle db server. 
  Based on, what I have read, the easiest way is stopping the instance then restart it again.</p>
  
  <p>My understanding is it basically will physically reallocate current instance, which would cause IP change. However, apart from that, what else would be changed.</p>
  
  <p>Currently the instance about to be retired is running as our principle database server. it is connected by both application server (with 20+ web applications) and a slave db server instances.</p>
  
  <p>Connection string between application server and the db instance uses AWS internal computer name (i.e.Data Source=IP-0A882XXX;User ID=username;Password=password;Initial Catalog=dbName;Failover Partner=IP-0A80XXX), which should not be changed after stop/restart. I am I correct?</p>
  
  <p>Is there anything else I should be aware of? such as Security, Firewall Settings, etc.?</p>
  
  <p>If anyone could pointing me to a check list would be greatly appreciated!</p>