adminSecurity Log Review and Alert Threshold Checklist
Security monitoring should detect suspicious behavior early without creating useless noise. A practical alert system watches login failures, unknown admin activity, 403 spikes, 404 scans, wp-login bursts, XML-RPC traffic, service failures and resource anomalies.
Core principle
Logs become useful when they turn into decisions. Define which patterns are normal, suspicious and urgent.
Checklist
- Define critical logs to review.
- Track SSH failed login attempts.
- Track WordPress login attack patterns.
- Track repeated 403 and 404 requests.
- Track unusual admin activity.
- Track service failures.
- Track CPU, RAM and disk anomalies.
- Set alert thresholds conservatively.
- Send alerts to a channel you actually check.
- Review and tune thresholds weekly.
Reusable lesson
Security alerts should help you act faster, not panic more. Good thresholds turn noisy logs into operational intelligence.
When to Use This Checklist
Use this checklist when building security monitoring for VPS websites, WordPress, Nginx, Docker or automation systems.
Required Tools
SSH access, Nginx logs, auth logs, WordPress security logs, monitoring tool, alert channel
Before You Start
Do not alert on everything. Choose patterns that indicate real risk or require action.
Structured Checklist Steps
- Define critical logs.
- Track SSH failures.
- Track WordPress login attacks.
- Track 403 and 404 spikes.
- Track admin activity.
- Track service failures.
- Track resource anomalies.
- Set thresholds.
- Send alerts.
- Tune weekly.
Verification Steps
- Important logs are known.
- Alerts are received.
- Thresholds are not too noisy.
- Suspicious patterns are visible.
- Weekly review improves detection quality.
Rollback Plan
If alerts become noisy, raise thresholds or narrow patterns, but do not turn off security monitoring completely.
Common Mistakes
- No alert channel.
- Too many noisy alerts.
- Ignoring auth logs.
- Not tracking wp-login spikes.
- No weekly tuning.
Related Commands
sudo tail -n 100 /var/log/auth.log
sudo tail -n 100 /var/log/nginx/access.log
sudo grep "wp-login.php" /var/log/nginx/access.log | tail -n 50
sudo awk '{print $9}' /var/log/nginx/access.log | sort | uniq -c | sort -nr | head
systemctl --failed
df -h