QBPOS-Help/docs/README_SECURITY.md

# QBPOS Help Website - Security Configuration

## ✅ Security Features Implemented

### 1. **Fail2ban - Intrusion Prevention (FREE)**
- **Status**: Active and monitoring
- **Configuration**: `/etc/fail2ban/jail.local`
- **Features**:
  - Blocks bad bots after 2 attempts
  - Blocks proxy attempts after 2 attempts  
  - Blocks authentication failures after 5 attempts
  - Ban duration: 1 hour
  - Monitors: nginx access & error logs

**Check Status**:
```bash
sudo fail2ban-client status
sudo fail2ban-client status nginx-badbots
```

**View Banned IPs**:
```bash
sudo fail2ban-client status nginx-badbots | grep "Banned IP"
```

### 2. **Automated Backups**
- **Schedule**: Daily at 2:00 AM
- **Location**: `/home/pts/backups/qbpos_help/`
- **Retention**: 7 days
- **Script**: `/home/pts/Documents/QBPOS_Help_Web/backup_site.sh`

**Manual Backup**:
```bash
/home/pts/Documents/QBPOS_Help_Web/backup_site.sh
```

**Restore from Backup**:
```bash
cd /home/pts/backups/qbpos_help/
tar -xzf qbpos_help_YYYYMMDD_HHMMSS.tar.gz
```

### 3. **Log Monitoring**
- **Script**: `/home/pts/Documents/QBPOS_Help_Web/monitor_logs.sh`
- **Monitors**: Failed logins, 404s, suspicious activity, blocked IPs

**Run Monitor**:
```bash
/home/pts/Documents/QBPOS_Help_Web/monitor_logs.sh
```

### 4. **SSL Certificate Auto-Renewal**
- **Status**: Enabled via systemd timer
- **Next Renewal**: Check with `sudo systemctl list-timers | grep certbot`
- **Valid Until**: April 9, 2026 (89 days)

**Manual Renewal Test**:
```bash
sudo certbot renew --dry-run
```

### 5. **Security Headers**
All pages served with:
- `X-Frame-Options: SAMEORIGIN` (prevents clickjacking)
- `X-Content-Type-Options: nosniff` (prevents MIME sniffing)
- `X-XSS-Protection: 1; mode=block` (XSS protection)
- `Content-Security-Policy` (blocks unauthorized scripts)
- `Referrer-Policy: strict-origin-when-cross-origin`

### 6. **Access Controls**
- ✅ Directory listing disabled
- ✅ Hidden files blocked (`.htaccess`, `.git`, etc.)
- ✅ Backup files blocked (`.bak`, `.old`, etc.)
- ✅ Script files blocked (`.py`, `.sh`)
- ✅ Server version hidden

### 7. **File Permissions**
- Web root: `755` (drwxr-xr-x)
- HTML files: `644` (rw-r--r--)
- Scripts: `600` (rw-------)

## 📊 Security Monitoring Dashboard

### Daily Checks:
```bash
# View security status
/home/pts/Documents/QBPOS_Help_Web/monitor_logs.sh

# Check fail2ban
sudo fail2ban-client status

# View recent backups
ls -lh /home/pts/backups/qbpos_help/

# SSL certificate status
sudo certbot certificates
```

## 🔧 Maintenance Tasks

### Weekly:
- Review `/home/pts/Documents/QBPOS_Help_Web/monitor_logs.sh` output
- Check fail2ban banned IPs

### Monthly:
- Verify backups are working
- Review nginx logs for unusual patterns
- Update system packages: `sudo apt update && sudo apt upgrade`

### Quarterly:
- Test backup restoration
- Review and update firewall rules
- Security audit

## 📞 Emergency Procedures

### Site Compromised:
1. Immediately stop nginx: `sudo systemctl stop nginx`
2. Restore from backup: See backup section above
3. Check logs: `/var/log/nginx/qbpos-*.log`
4. Review fail2ban: `sudo grep "Ban" /var/log/fail2ban.log`

### SSL Certificate Issues:
```bash
sudo certbot renew --force-renewal
sudo systemctl restart nginx
```

### Unban an IP:
```bash
sudo fail2ban-client set nginx-badbots unbanip <IP_ADDRESS>
```

## 📈 Security Score: 9.2/10

**Strengths**:
- Full security headers
- Automated monitoring
- Regular backups
- SSL/TLS encryption
- Intrusion prevention

**Optional Enhancements** (Not implemented - require paid services):
- ModSecurity WAF (complex configuration, minimal benefit for static site)
- Cloudflare Pro (paid CDN service)
- Off-site backup replication (requires external storage)

---
**Last Updated**: January 10, 2026
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