1
// FWaaS 数据包处理流水线（DPDK 风格）
2
struct fwaas_pipeline {
3
    struct rte_mempool    *mbuf_pool;
4
    struct rte_ring       *allow_ring;
5
    struct rte_ring       *drop_ring;
6
    struct session_table  *sessions;
7
    struct rule_engine    *rules;
8
};
9

10
int fwaas_rx_process(struct fwaas_pipeline *pipe) {
11
    struct rte_mbuf *pkts[MAX_PKT_BURST];
12
    uint16_t nb_rx = rte_eth_rx_burst(PORT_ID, QUEUE_ID, pkts, MAX_PKT_BURST);
13

14
    for (int i = 0; i < nb_rx; i++) {
15
        if (i + 1 < nb_rx) rte_prefetch0(pkts[i + 1]);
16

17
        // 快速路径：已建立会话直接转发
18
        struct session_entry *sess = session_lookup(pipe->sessions, pkts[i]);
19
        if (sess && sess->state == SESS_ESTABLISHED) {
20
            rte_ring_enqueue(pipe->allow_ring, pkts[i]);
21
            continue;
22
        }
23

24
        // 慢速路径：新会话走完整检测
25
        enum fw_action action = fwaas_inspect(pipe, pkts[i]);
26
        if (action == ACTION_ALLOW) {
27
            session_create(pipe->sessions, pkts[i]);
28
            rte_ring_enqueue(pipe->allow_ring, pkts[i]);
29
        } else {
30
            log_dropped_packet(pkts[i], action);
31
            rte_pktmbuf_free(pkts[i]);
32
        }
33
    }
34
    return 0;
35
}

1
// 会话条目
2
struct session_entry {
3
    uint32_t    src_ip, dst_ip;
4
    uint16_t    src_port, dst_port;
5
    uint8_t     protocol;
6
    volatile uint8_t  state;          // TCP 状态机
7
    uint64_t    last_pkt_time;
8
    uint64_t    packets_in, packets_out;
9
    uint64_t    bytes_in, bytes_out;
10
    uint32_t    rule_id;              // 命中规则 ID
11
    uint8_t     action;               // 放行/阻断
12
    uint8_t     app_id;               // 应用识别结果
13
};

1
// 策略分发引擎：保证多引擎节点策略一致性
2
type PolicyDistributor struct {
3
    mu          sync.RWMutex
4
    version     int64
5
    rules       map[string]*FirewallRule
6
    subscribers map[string]chan *PolicyUpdate
7
    eventCh     chan *PolicyUpdate
8
}
9

10
// AddRule 添加规则并通知所有引擎节点
11
func (d *PolicyDistributor) AddRule(rule *FirewallRule) error {
12
    d.mu.Lock()
13
    defer d.mu.Unlock()
14
    d.version++
15
    rule.Version = d.version
16
    d.rules[rule.RuleID] = rule
17
    d.eventCh <- &PolicyUpdate{Type: "ADD", Rule: rule, Version: d.version}
18
    return nil
19
}
20

21
// dispatchLoop 将更新推送到所有订阅者
22
func (d *PolicyDistributor) dispatchLoop() {
23
    for update := range d.eventCh {
24
        d.mu.RLock()
25
        for _, ch := range d.subscribers {
26
            select {
27
            case ch <- update:
28
            default: // 缓冲区满，持久化后重试
29
            }
30
        }
31
        d.mu.RUnlock()
32
    }
33
}

1
# FWaaS 管理平面配置
2
fwaas_management:
3
  tenants:
4
    - tenant_id: "tenant-001"
5
      name: "生产环境"
6
      quota: { max_rules: 5000, max_sessions: 1000000, max_bandwidth: "10Gbps" }
7
      isolation: { vrf: "vrf-prod", dedicated_engine: true }
8

9
    - tenant_id: "tenant-002"
10
      name: "测试环境"
11
      quota: { max_rules: 1000, max_sessions: 200000, max_bandwidth: "1Gbps" }
12

13
  policy_templates:
14
    - name: "基线防护"
15
      rules:
16
        - action: deny
17
          src_ip: "0.0.0.0/0"
18
          dst_port: 22
19
          protocol: tcp
20
        - action: deny
21
          src_ip: "0.0.0.0/0"
22
          dst_port: 3389
23
          protocol: tcp
24

25
  audit:
26
    enabled: true
27
    retention: 180d
28
    fields: [operator, action, tenant_id, rule_changes, timestamp]

1
# 工作负载标签定义
2
workload_labels:
3
  - workload_id: "web-frontend-prod"
4
    ip: "10.0.1.10"
5
    labels: { app: "web-frontend", env: "prod", tier: "web", sensitivity: "low" }
6

7
  - workload_id: "api-backend-prod"
8
    ip: "10.0.2.20"
9
    labels: { app: "api-backend", env: "prod", tier: "app", sensitivity: "medium" }
10

11
  - workload_id: "db-mysql-prod"
12
    ip: "10.0.3.30"
13
    labels: { app: "mysql-primary", env: "prod", tier: "db", sensitivity: "high" }
14

15
# 标签驱动的微隔离策略
16
microsegmentation_policies:
17
  - name: "web-to-app"
18
    source: { labels: { tier: "web", env: "prod" } }
19
    destination: { labels: { tier: "app", env: "prod" } }
20
    allowed: [{ port: 443, protocol: tcp }]
21
    action: allow
22

23
  - name: "app-to-db"
24
    source: { labels: { tier: "app", env: "prod" } }
25
    destination: { labels: { tier: "db", env: "prod" } }
26
    allowed: [{ port: 3306, protocol: tcp }]
27
    action: allow
28

29
  - name: "deny-lateral-movement"
30
    source: { labels: { env: "prod" } }
31
    destination: { labels: { env: "prod", sensitivity: "high" } }
32
    allowed: []
33
    action: deny
34
    alert: true

1
# FWaaS 弹性伸缩配置
2
fwaas_scaling:
3
  engine_cluster:
4
    min_replicas: 2
5
    max_replicas: 20
6
    default_replicas: 4
7

8
  policies:
9
    - name: "traffic-scaling"
10
      metric: "throughput_mbps"
11
      scale_up: { threshold: 8000, cooldown: 60s, step: 2 }
12
      scale_down: { threshold: 2000, cooldown: 300s, step: 1 }
13

14
    - name: "cpu-scaling"
15
      metric: "cpu_usage_percent"
16
      scale_up: { threshold: 75, cooldown: 60s, step: 2 }
17
      scale_down: { threshold: 30, cooldown: 300s, step: 1 }
18

19
    - name: "session-scaling"
20
      metric: "active_sessions"
21
      scale_up: { threshold: 800000, cooldown: 60s, step: 2 }
22
      scale_down: { threshold: 200000, cooldown: 300s, step: 1 }
23

24
  safeguards:
25
    prevent_scale_down_during_peak: true
26
    peak_hours: "09:00-12:00,14:00-18:00"
27
    min_healthy_replicas: 2

1
// 会话同步协议结构
2
struct ha_sync_msg {
3
    uint8_t     msg_type;       // SYNC_ADD, SYNC_DEL, SYNC_UPDATE
4
    uint16_t    count;          // 批量同步条目数
5
    uint32_t    seq_num;
6
    uint64_t    timestamp;
7
};
8

9
struct ha_session_record {
10
    uint32_t    src_ip, dst_ip;
11
    uint16_t    src_port, dst_port;
12
    uint8_t     protocol, tcp_state, action;
13
    uint32_t    rule_id;
14
    uint64_t    packets_in, packets_out;
15
    uint64_t    bytes_in, bytes_out;
16
};
17

18
// HA 管理器
19
struct ha_manager {
20
    int             sock_fd;
21
    uint32_t        local_seq, remote_seq;
22
    uint8_t         role;               // MASTER / BACKUP
23
    struct ring_buf *sync_queue;
24
};

1
# FWaaS 威胁情报自动响应配置
2
threat_intel_response:
3
  feeds:
4
    - name: "commercial-ioc"
5
      type: "stix"
6
      url: "https://tip.example.com/api/v1/ioc"
7
      sync_interval: 300s
8
      confidence_min: 0.7
9

10
    - name: "cert-advisory"
11
      type: "csv"
12
      url: "https://cert.example.com/advisory/feed"
13
      sync_interval: 600s
14

15
  # IOC 自动封禁
16
  ioc_auto_block:
17
    enabled: true
18
    ioc_types: [ip, domain, url, hash]
19
    action: deny
20
    duration: 86400s
21
    alert: { severity: high, notify: ["security-team", "soc"] }
22

23
  # 恶意域名阻断
24
  dns_blocking:
25
    enabled: true
26
    response: "0.0.0.0"
27
    categories: [malware, phishing, c2, cryptomining]
28

29
  # C2 通信拦截
30
  c2_interception:
31
    enabled: true
32
    detection: [beacon_analysis, dns_tunneling, tls_fingerprint]
33
    action: deny
34
    alert: { severity: critical, notify: ["soc"], auto_create_ticket: true }

1
// 虚拟补丁规则生成引擎
2
package vpatch
3

4
// VulnerabilityInfo 漏洞信息
5
type VulnerabilityInfo struct {
6
    CVE        string
7
    Severity   string    // CRITICAL, HIGH, MEDIUM
8
    Product    string
9
    AttackType string    // RCE, SQLi, XSS
10
    ExploitPB  string    // 攻击载荷特征
11
    PublishedAt time.Time
12
}
13

14
// VirtualPatchRule 虚拟补丁规则
15
type VirtualPatchRule struct {
16
    RuleID   string
17
    CVE      string
18
    Protocol string
19
    Pattern  string
20
    Action   string    // deny / alert
21
    Expiry   time.Time
22
}
23

24
// GeneratePatchRule 根据漏洞信息生成虚拟补丁规则
25
func GeneratePatchRule(vuln *VulnerabilityInfo) (*VirtualPatchRule, error) {
26
    if vuln.ExploitPB == "" {
27
        return nil, fmt.Errorf("no exploit pattern for %s", vuln.CVE)
28
    }
29

30
    protocol := inferProtocol(vuln.AttackType)
31
    pattern := fmt.Sprintf("product:%s|payload:%s", vuln.Product, vuln.ExploitPB)
32

33
    // 根据严重程度决定动作：CRITICAL/HIGH 直接阻断，其余告警
34
    action := "alert"
35
    if vuln.Severity == "CRITICAL" || vuln.Severity == "HIGH" {
36
        action = "deny"
37
    }
38

39
    return &VirtualPatchRule{
40
        RuleID:   fmt.Sprintf("VP-%s", strings.ReplaceAll(vuln.CVE, "CVE-", "")),
41
        CVE:      vuln.CVE,
42
        Protocol: protocol,
43
        Pattern:  pattern,
44
        Action:   action,
45
        Expiry:   vuln.PublishedAt.Add(30 * 24 * time.Hour),
46
    }, nil
47
}
48

49
func inferProtocol(attackType string) string {
50
    switch {
51
    case strings.Contains(attackType, "SQLi"),
52
        strings.Contains(attackType, "RCE"):
53
        return "http"
54
    case strings.Contains(attackType, "DNS"):
55
        return "dns"
56
    default:
57
        return "tcp"
58
    }
59
}

1
# 策略迁移 checklist
2
migration_checklist:
3
  pre_migration:
4
    - [ ] 盘点现有规则数量和类型
5
    - [ ] 识别影子规则（长期未命中）
6
    - [ ] 检测规则冲突
7
    - [ ] 评估业务影响窗口
8

9
  rule_conversion:
10
    - [ ] IP 地址映射到标签
11
    - [ ] 端口规则转换为应用策略
12
    - [ ] NAT/VPN 规则单独处理
13

14
  migration_execution:
15
    - [ ] FWaaS 创建策略（影子模式）
16
    - [ ] 对比命中结果，调整策略
17
    - [ ] 灰度切换 → 全量切换
18

19
  post_migration:
20
    - [ ] 业务连通性验证
21
    - [ ] 安全策略有效性验证
22
    - [ ] 回滚方案就绪
23

24
  shadow_rule_cleanup:
25
    criteria: { no_hit_days: 90, expired_time_range: true }
26
    action: disable_first
27
    observation_period: 7d

1
# FWaaS 性能调优配置
2
fwaas_performance:
3
  rule_optimization:
4
    auto_reorder: true           # 高频命中规则前置
5
    merge_enabled: true          # 相同动作的相邻规则合并
6
    max_rules_per_tenant: 5000
7

8
  session_tuning:
9
    max_sessions: 16000000       # 1600 万并发
10
    timeouts: { tcp_established: 3600s, tcp_half_open: 30s, udp: 120s }
11
    fast_path: true              # 已建立会话走快速路径
12

13
  detection_engine:
14
    dpi: { enabled: true, max_inspect_depth: 4096 }
15
    ips: { enabled: true, action: deny, false_positive_mode: low }
16
    antivirus: { enabled: true, scan_max_size: 5242880, archive_depth: 3 }