If at any point your AWS LightSail website starts crashing, you might want to consider attackers. Aside from the typical things you can manage through CloudFlare, you can also run a few commands to help you narrow down the problem.

Check your work

Change directory to the Apache 2 logs.

cd /opt/bitnami/apache2/logs/

This will show you the number of times that an IP address connected to your Web server.

tail -n 10000 access_log | awk '{print $1}'| sort| uniq -c| sort -nr| head -n 10

Source

Other things to try

Try to check if there are any different Apache server running.

ps aux | grep http

See if anything is bound to port 80.

netstat -aon | more

Kill nginx server.

sudo pkill -f nginx

Kill apache server.

sudo pkill -f apache

Restart apache.

sudo /opt/bitnami/ctlscript.sh start apache

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