For AWS public IP changes, here's what you need to do:
1. New Instance IP
The new instance should already have a public IP automatically assigned (unless you specifically disabled it).
2. Update DNS (if using a domain)
If you have a domain pointing to your old IP:
- Go to Route 53 (or your DNS provider)
- Update the A record to point to the new public IP
3. Elastic IP Considerations
- If you had an Elastic IP on the old instance โ disassociate and release it (or re-associate to new instance)
- If you want a static IP going forward โ allocate an Elastic IP and associate it with your new instance
4. Security Groups
Check if your security groups reference the old IP in any rules (e.g., whitelisted IPs). Update if needed.