Amazon Lightsail firewall now supports source-IP based rules and PING
Amazon Lightsail now supports source-IP based firewall rules, allowing you to allow or restrict the network traffic to your instances based on the source IP, port and protocol of the traffic flowing in. Lightsail firewall rules already supported port and protocol. Addition of the source-IP condition gives you more granularity in controlling who can access your instances or the applications hosted on it.
Source:: Amazon AWS