claude-plugins/infraestrutura/skills/security-check/SKILL.md

name, description, context, layer

name	description	context	layer
security-check	Auditoria de seguranca de infraestrutura — certificados SSL, portas abertas, actualizacoes pendentes, backups recentes, CSF/firewall e email security. Score por servidor.	fork	wiki

/security-check v1.0 (infraestrutura)

Auditoria de seguranca dos servidores Descomplicar. Verifica SSL, portas, actualizacoes, backups, firewall e email security.

Auditoria de dependencias de codigo: usar /dep-audit (plugin dev-tools).

Referencia: PROC-Security-Audit-API-Keys.md | PROC-Backup-Sistema.md | Memory: infra.md, cwp-ssl-autorenew-fix.md

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Servidores Alvo

Alias	Host	IP	SO	Firewall	Gestor SSL
server	server.descomplicar.pt	176.9.3.158	CentOS (CWP)	CSF v15	acme.sh
easy	qibspu.easypanel.host	178.63.18.51	Ubuntu 24.04	—	EasyPanel/Traefik
gateway	gateway.descomplicar.pt	—	—	—	nginx/acme

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Modos de Execucao

Comando	Descricao
/security-check	Auditoria completa (todos os servidores, todos os checks)
/security-check server	Apenas servidor CWP
/security-check easy	Apenas EasyPanel
/security-check ssl	Apenas certificados SSL (todos os servidores)
/security-check quick	Resumo rapido: SSL a expirar + backups + firewall

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Protocolo de Execucao

Check 1: Certificados SSL (server)

# Executar via mcp__ssh-unified__ssh_execute(server="server")

# Listar todos os certs e datas de expiracao
for dir in /root/.acme.sh/cwp_certs/*_ecc; do
  domain=$(basename "$dir" | sed 's/_ecc$//')
  cert="$dir/${domain}.cer"
  if [ -f "$cert" ]; then
    expiry=$(openssl x509 -enddate -noout -in "$cert" 2>/dev/null | cut -d= -f2)
    days=$(( ($(date -d "$expiry" +%s) - $(date +%s)) / 86400 ))
    if [ "$days" -lt 15 ]; then
      echo "CRITICAL $domain expires in ${days}d ($expiry)"
    elif [ "$days" -lt 30 ]; then
      echo "WARN     $domain expires in ${days}d ($expiry)"
    else
      echo "OK       $domain expires in ${days}d"
    fi
  fi
done | sort

Thresholds:

• OK: >30 dias para expirar
• WARN: 15-30 dias
• CRITICAL: <15 dias

Check 2: Portas Abertas (server)

# Portas a escutar no servidor CWP
ss -tlnp | awk 'NR>1 {print $4}' | sed 's/.*://' | sort -n | uniq

# Portas esperadas (CWP padrao):
# 22(SSH) 25(SMTP) 80(HTTP) 110(POP3) 143(IMAP) 443(HTTPS)
# 465(SMTPS) 587(Submission) 993(IMAPS) 995(POP3S)
# 2031(CWP) 2087(CWP Admin) 3306(MySQL)
# 8443(CWP SSL) 9443(SSH alternativo)
EXPECTED="22 25 80 110 143 443 465 587 993 995 2031 2087 3306 8443 9443"

# Comparar: portas abertas que NAO estao na lista esperada
ss -tlnp | awk 'NR>1 {print $4}' | sed 's/.*://' | sort -n | uniq | while read port; do
  if ! echo "$EXPECTED" | grep -qw "$port"; then
    proc=$(ss -tlnp | grep ":${port} " | sed 's/.*users:(("//' | cut -d'"' -f1)
    echo "UNEXPECTED :${port} ($proc)"
  fi
done

Check 3: Actualizacoes Pendentes

# CWP Server (CentOS/dnf)
# mcp__ssh-unified__ssh_execute(server="server")
dnf check-update --quiet 2>/dev/null | grep -v "^$" | wc -l
# Se >0: listar security updates
dnf updateinfo list security 2>/dev/null | tail -10

# EasyPanel (Ubuntu/apt)
# mcp__ssh-unified__ssh_execute(server="easy")
apt list --upgradable 2>/dev/null | grep -c upgradable
# Se >0: listar security updates
apt list --upgradable 2>/dev/null | grep -i secur

Thresholds:

• OK: 0 security updates pendentes
• WARN: 1-5 security updates
• CRITICAL: >5 security updates OU kernel update pendente

Check 4: Backups Recentes (server)

# mcp__ssh-unified__ssh_execute(server="server")

echo "=== MySQL Daily ==="
ls -lt /home/backup/mysql/daily/ 2>/dev/null | head -3
latest_mysql=$(find /home/backup/mysql/daily/ -name "*.sql.gz" -mtime -2 2>/dev/null | wc -l)
echo "BDs com backup <48h: $latest_mysql"

echo "=== Monthly ==="
ls -lt /home/backup/monthly/ 2>/dev/null | head -5

echo "=== Rsync Easy->Server ==="
# Verificar ultimo rsync (Easy replica para Server as 06:00)
ls -lt /gordito/backup-easy/ 2>/dev/null | head -3 || echo "path nao existe"

echo "=== Idade ultimo backup ==="
newest=$(find /home/backup/ -type f -name "*.gz" -printf '%T@\n' 2>/dev/null | sort -rn | head -1)
if [ -n "$newest" ]; then
  age_hours=$(echo "scale=1; ($(date +%s) - $newest) / 3600" | bc)
  echo "Backup mais recente: ${age_hours}h atras"
fi

Thresholds:

• OK: backup MySQL <48h, monthly <35 dias
• WARN: backup MySQL 48-72h, monthly 35-60 dias
• CRITICAL: backup MySQL >72h, monthly >60 dias

Check 5: Firewall CSF (server)

# mcp__ssh-unified__ssh_execute(server="server")

echo "=== CSF Status ==="
csf -v
csf -l | head -5

echo "=== IPs Bloqueados ==="
wc -l /etc/csf/csf.deny
echo "Ultimos 5 bloqueios:"
tail -5 /etc/csf/csf.deny

echo "=== LFD Status ==="
systemctl is-active lfd

echo "=== Ataques Recentes (24h) ==="
grep "$(date