My LightSail Bitnami LAMP instance crashing

There are a few potential reasons why your Lightsail Bitnami LAMP instance might be crashing regularly at 0600 EST:

1. Scheduled tasks: It's possible that there are automated tasks or cron jobs running at that time which are causing resource spikes or conflicts.

2. Automatic updates: Some systems perform automatic updates at set times, which could potentially cause issues if there are conflicts or resource constraints.

3. External traffic patterns: Even if you don't expect heavy use, there might be periodic external access attempts or scans occurring at that time.

4. Resource exhaustion: Despite having 4GB RAM and 2 CPUs, your instance might be hitting resource limits due to accumulated processes or memory leaks.

To troubleshoot, you can:

• Check system logs for errors or unusual activity around the crash time
• Monitor CPU, memory, and disk usage leading up to the crash
• Review any scheduled tasks or cron jobs
• Investigate running processes and services

Regarding publicly flagged IP addresses accessing your instance, AWS doesn't automatically block these because:

1. It could interfere with legitimate traffic
2. IP reputation can change over time
3. Different customers have different security needs

To enhance security, you can:

• Use AWS WAF (Web Application Firewall) for more granular traffic control
• Configure your instance's firewall rules to limit access
• Implement additional security measures at the application level

If the issue persists, consider taking a snapshot before the usual crash time and analyzing it, or reaching out to AWS support for more in-depth assistance.

Sources
lightsail instance down everyday. | AWS re:Post
Something strange with lightsail instance at 2AM | AWS re:Post
AWS Lightsail and EC2 Instances Going Down Daily — WP Rocket Conflict | AWS re:Post