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34.2 沙箱隔离配置

学习如何配置和使用 Claude Code 的沙箱隔离功能,为企业环境提供更安全的代理执行环境。

34.2.1 沙箱隔离概述

什么是沙箱隔离

沙箱隔离是 Claude Code 提供的一种安全机制,通过操作系统级原语强制执行文件系统和网络隔离。它允许 Claude Code 在预定义的安全边界内自主运行,减少对持续权限提示的依赖。

沙箱隔离的优势

  • 减少批准疲劳 :安全命令无需逐个批准
  • 提高生产力 :减少工作流中断
  • 增强安全性 :定义清晰的访问边界
  • 启用自主性 :Claude Code 可以更独立地工作
  • 全面保护 :文件系统和网络双重隔离

沙箱隔离的适用场景

  • 企业开发环境
  • 处理敏感数据的项目
  • 需要高安全性的生产环境
  • 自动化 CI/CD 流程
  • 多租户开发环境

34.2.2 沙箱隔离工作原理

文件系统隔离

沙箱化 bash 工具通过以下方式限制文件系统访问:

沙箱文件系统访问规则示例

SANDBOX_FILESYSTEM_RULES = { "allowed_write_paths": [ "/workspace", # 当前工作目录 "/tmp", # 临时目录 "/home/developer/.cache" # 缓存目录 ], "allowed_read_paths": [ "/", # 整个系统(默认) "/usr/local/bin", # 系统工具 "/opt/tools" # 企业工具 ], "denied_paths": [ "/etc", # 系统配置 "/root", # root 用户目录 "/home/developer/.ssh", # SSH 密钥 "/home/developer/.aws", # AWS 凭证 "~/.config/claude-code" # Claude Code 配置 ] }

网络隔离

网络访问通过代理服务器控制:

沙箱网络访问规则示例

SANDBOX_NETWORK_RULES = { "allowed_domains": [ "api.anthropic.com", "code.claude.com", "github.com", "npmjs.org", ".company.com" ], "denied_domains": [ "", "malicious-site.com" ], "proxy_settings": { "http_proxy": "http://proxy.company.com:8080", "https_proxy": "http://proxy.comany.com:8080", "no_proxy": "localhost,127.0.0.1,.company.com" } }

操作系统级强制执行

不同平台的实现方式:

Linux: 使用 bubblewrap

bwrap
--ro-bind /usr /usr
--ro-bind /lib /lib
--bind /workspace /workspace
--bind /tmp /tmp
--dev /dev
--proc /proc
--unshare-net
--setenv PATH /usr/bin:/bin
/bin/bash

macOS: 使用 Seatbelt

sandbox-exec
-f /path/to/sandbox.profile
/bin/bash

34.2.3 快速入门

启用沙箱隔离

在 Claude Code 中运行斜杠命令:

bash
/sandbox

这将使用默认设置激活沙箱化 bash 工具。

验证沙箱状态

检查沙箱是否启用

/sandbox status

查看当前沙箱配置

/sandbox config

测试沙箱隔离

测试文件系统隔离 - 应该成功

echo "test" > /workspace/test.txt

测试文件系统隔离 - 应该失败

echo "test" > /etc/test.txt

测试网络隔离 - 应该成功

curl https://api.anthropic.com

测试网络隔离 - 应该失败

curl https://example.com

34.2.4 基础配置

settings.json 配置

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": [
        "${workspaceFolder}",
        "/tmp"
      ],
      "deniedPaths": [
        "/etc",
        "/root",
        "~/.ssh",
        "~/.aws"
      ]
    },
    "network": {
      "allowedDomains": [
        "api.anthropic.com",
        "code.claude.com",
        "github.com",
        "npmjs.org"
      ],
      "httpProxy": "http://proxy.company.com:8080",
      "httpsProxy": "http://proxy.company.com:8080"
    },
    "excludedCommands": [
      "docker",
      "systemctl"
    ],
    "allowUnsandboxedCommands": false
  }
}

环境变量配置

启用沙箱

typescript
export CLAUDE_SANDBOX_ENABLED=true

配置文件系统路径

typescript
export CLAUDE_SANDBOX_WRITE_PATHS="/workspace,/tmp"
export CLAUDE_SANDBOX_DENY_PATHS="/etc,/root,~/.ssh"

配置网络

typescript
export CLAUDE_SANDBOX_ALLOWED_DOMAINS="api.anthropic.com,code.claude.com,github.com"
export CLAUDE_SANDBOX_HTTP_PROXY="http://proxy.company.com:8080"
export CLAUDE_SANDBOX_HTTPS_PROXY="http://proxy.company.com:8080"

34.2.5 企业级配置

多环境沙箱配置

开发环境配置:

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": [
        "${workspaceFolder}",
        "/tmp",
        "/home/developer/.cache"
      ],
      "deniedPaths": [
        "/etc",
        "/root",
        "~/.ssh",
        "~/.aws",
        "~/.config/claude-code"
      ]
    },
    "network": {
      "allowedDomains": [
        "api.anthropic.com",
        "code.claude.com",
        "github.com",
        "npmjs.org",
        "*.dev.company.com"
      ],
      "httpProxy": "http://proxy-dev.company.com:8080",
      "httpsProxy": "http://proxy-dev.company.com:8080"
    },
    "excludedCommands": [
      "docker",
      "kubectl"
    ],
    "allowUnsandboxedCommands": true
  }
}

生产环境配置:

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": [
        "${workspaceFolder}/build",
        "${workspaceFolder}/dist",
        "/tmp"
      ],
      "deniedPaths": [
        "/etc",
        "/root",
        "~/.ssh",
        "~/.aws",
        "~/.config",
        "${workspaceFolder}/src"
      ]
    },
    "network": {
      "allowedDomains": [
        "api.anthropic.com",
        "code.claude.com",
        "*.prod.company.com"
      ],
      "httpProxy": "http://proxy-prod.company.com:8080",
      "httpsProxy": "http://proxy-prod.company.com:8080"
    },
    "excludedCommands": [],
    "allowUnsandboxedCommands": false,
    "enableWeakerNestedSandbox": false
  }
}

项目级配置

为不同类型的项目创建专门的沙箱配置:

前端项目配置 (frontend-sandbox.json):

json
{

"name": "Frontend Sandbox", "sandbox": { "filesystem": { "allowedWritePaths": [ "${workspaceFolder}", "/tmp", "/home/developer/.npm" ], "deniedPaths": [ "/etc", "/root", "~/.ssh", "~/.aws" ] }, "network": { "allowedDomains": [ "api.anthropic.com", "code.claude.com", "github.com", "npmjs.org", "registry.npmjs.org", "*.api.company.com" ] }, "excludedCommands": [ "docker" ] } }

后端项目配置 (backend-sandbox.json):

json
{

"name": "Backend Sandbox", "sandbox": { "filesystem": { "allowedWritePaths": [ "${workspaceFolder}", "/tmp", "/var/log/app" ], "deniedPaths": [ "/etc", "/root", "~/.ssh", "~/.aws", "/var/lib" ] }, "network": { "allowedDomains": [ "api.anthropic.com", "code.claude.com", "github.com", ".api.company.com", ".db.company.com" ] }, "excludedCommands": [ "docker", "systemctl", "service" ] } }

34.2.6 高级配置

自定义代理配置

自定义代理服务器实现

python
import asyncio
from aiohttp import web

class SandboxProxy:
    def __init__(self, allowed_domains, audit_log_path):
        self.allowed_domains = set(allowed_domains)
        self.audit_log_path = audit_log_path

    async def proxy_handler(self, request):
        target_url = request.headers.get('X-Target-URL')
    # 检查域名是否在白名单中
python
        from urllib.parse import urlparse
        parsed = urlparse(target_url)
        domain = parsed.netloc

        if domain not in self.allowed_domains:
        # 记录拒绝的访问
python
            self.log_access(request, target_url, allowed=False)
            return web.Response(status=403, text="Domain not allowed")
    # 转发请求
typescript
        async with aiohttp.ClientSession() as session:
            async with session.request(
                request.method,
                target_url,
                headers=request.headers,
                data=await request.read()
            ) as response:
            # 记录允许的访问
python
                self.log_access(request, target_url, allowed=True)
                return web.Response(
                    status=response.status,
                    body=await response.read()
                )

    def log_access(self, request, url, allowed):
        import json
        from datetime import datetime
        log_entry = {
            "timestamp": datetime.now().isoformat(),
            "client_ip": request.remote,
            "url": url,
            "allowed": allowed,
            "method": request.method
        }
        with open(self.audit_log_path, 'a') as f:
            f.write(json.dumps(log_entry) + '\n')

    def start(self, host='0.0.0.0', port=8080):
        app = web.Application()
        app.router.add_route('*', '/{path:.*}', self.proxy_handler)
        web.run_app(app, host=host, port=port)

使用示例

bash
if __name__ == '__main__':
    proxy = SandboxProxy(
        allowed_domains=[
            'api.anthropic.com',
            'code.claude.com',
            'github.com'
        ],
        audit_log_path='/var/log/sandbox-proxy.log'
    )
    proxy.start()

Unix Socket 配置

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": ["${workspaceFolder}"],
      "allowedUnixSockets": [
        "/var/run/docker.sock",
        "/tmp/vscode-git.sock"
      ]
    },
    "network": {
      "allowedDomains": ["api.anthropic.com", "code.claude.com"]
    }
  }
}

嵌套沙箱配置

json
{
  "sandbox": {
    "enabled": true,
    "enableWeakerNestedSandbox": true,
    "filesystem": {
      "allowedWritePaths": ["${workspaceFolder}"]
    },
    "network": {
      "allowedDomains": ["api.anthropic.com", "code.claude.com"]
    }
  }
}

34.2.7 安全最佳实践

1. 最小权限原则

从最严格的配置开始,根据需要逐步放宽:

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": ["${workspaceFolder}"],
      "deniedPaths": [
        "/etc",
        "/root",
        "~/.ssh",
        "~/.aws",
        "~/.config",
        "/usr/local/bin",
        "/opt"
      ]
    },
    "network": {
      "allowedDomains": ["api.anthropic.com", "code.claude.com"]
    },
    "excludedCommands": [],
    "allowUnsandboxedCommands": false
  }
}

2. 审计和监控

实现全面的审计日志记录:

python
import json
python
from datetime import datetime
from pathlib import Path

class SandboxAuditor:
    def __init__(self, log_dir='/var/log/claude-sandbox'):
        self.log_dir = Path(log_dir)
        self.log_dir.mkdir(parents=True, exist_ok=True)

    def log_filesystem_access(self, operation, path, allowed, user):
        log_entry = {
            "timestamp": datetime.now().isoformat(),
            "type": "filesystem",
            "operation": operation,
            "path": path,
            "allowed": allowed,
            "user": user
        }
        self._write_log(log_entry)

    def log_network_access(self, url, domain, allowed, user):
        log_entry = {
            "timestamp": datetime.now().isoformat(),
            "type": "network",
            "url": url,
            "domain": domain,
            "allowed": allowed,
            "user": user
        }
        self._write_log(log_entry)

    def log_command_execution(self, command, sandboxed, allowed, user):
        log_entry = {
            "timestamp": datetime.now().isoformat(),
            "type": "command",
            "command": command,
            "sandboxed": sandboxed,
            "allowed": allowed,
            "user": user
        }
        self._write_log(log_entry)

    def _write_log(self, log_entry):
        log_file = self.log_dir / f"sandbox-{datetime.now().strftime('%Y-%m-%d')}.log"
        with open(log_file, 'a') as f:
            f.write(json.dumps(log_entry) + '\n')

    def analyze_violations(self, days=7):
        violations = []
        for i in range(days):
            date = (datetime.now() - timedelta(days=i)).strftime('%Y-%m-%d')
            log_file = self.log_dir / f"sandbox-{date}.log"
            if log_file.exists():
                with open(log_file, 'r') as f:
                    for line in f:
                        entry = json.loads(line)
                        if not entry.get('allowed', True):
                            violations.append(entry)
        return violations

使用示例

auditor = SandboxAuditor()

记录文件系统访问

bash
auditor.log_filesystem_access('write', '/etc/config', False, 'developer')

记录网络访问

bash
auditor.log_network_access('https://malicious.com', 'malicious.com', False, 'developer')

分析违规

violations = auditor.analyze_violations(days=7) print(f"发现 {len(violations)} 个违规")

3. 定期审查

建立定期审查流程:

bash
#!/bin/bash

sandbox-audit.sh

LOG_DIR="/var/log/claude-sandbox" REPORT_DIR="/var/reports/sandbox" DATE=$(date +%Y-%m-%d)

创建报告目录

mkdir -p "$REPORT_DIR"

生成每日报告

echo "=== 沙箱审计报告 - $DATE ===" > "$REPORT_DIR/daily-$DATE.txt"

统计违规次数

VIOLATIONS=$(grep -r '"allowed": false' "$LOG_DIR" | wc -l) echo "总违规次数: $VIOLATIONS" >> "$REPORT_DIR/daily-$DATE.txt"

统计文件系统违规

FS_VIOLATIONS=$(grep -r '"type": "filesystem"' "$LOG_DIR" | grep '"allowed": false' | wc -l) echo "文件系统违规: $FS_VIOLATIONS" >> "$REPORT_DIR/daily-$DATE.txt"

统计网络违规

NET_VIOLATIONS=$(grep -r '"type": "network"' "$LOG_DIR" | grep '"allowed": false' | wc -l) echo "网络违规: $NET_VIOLATIONS" >> "$REPORT_DIR/daily-$DATE.txt"

列出最活跃的用户

echo -e "\n最活跃的用户:" >> "$REPORT_DIR/daily-$DATE.txt" grep -r '"user"' "$LOG_DIR" | jq -r '.user' | sort | uniq -c | sort -rn | head -10 >> "$REPORT_DIR/daily-$DATE.txt"

列出最常见的违规

echo -e "\n最常见的违规:" >> "$REPORT_DIR/daily-$DATE.txt" grep -r '"allowed": false' "$LOG_DIR" | jq -r '.path // .domain // .command' | sort | uniq -c | sort -rn | head -10 >> "$REPORT_DIR/daily-$DATE.txt"

echo "报告已生成: $REPORT_DIR/daily-$DATE.txt"

4. 环境隔离

为不同的环境使用不同的沙箱配置:

python
import json
python
from pathlib import Path

class SandboxConfigManager:
    def __init__(self, config_dir='/etc/claude-sandbox'):
        self.config_dir = Path(config_dir)
        self.config_dir.mkdir(parents=True, exist_ok=True)

    def create_config(self, environment, config):
        config_file = self.config_dir / f"{environment}.json"
        with open(config_file, 'w') as f:
            json.dump(config, f, indent=2)

    def get_config(self, environment):
        config_file = self.config_dir / f"{environment}.json"
        if config_file.exists():
            with open(config_file, 'r') as f:
                return json.load(f)
        return None

    def create_development_config(self):
        return {
            "sandbox": {
                "enabled": True,
                "filesystem": {
                    "allowedWritePaths": ["${workspaceFolder}", "/tmp"],
                    "deniedPaths": ["/etc", "/root", "~/.ssh", "~/.aws"]
                },
                "network": {
                    "allowedDomains": [
                        "api.anthropic.com",
                        "code.claude.com",
                        "github.com",
                        "npmjs.org",
                        "*.dev.company.com"
                    ]
                },
                "allowUnsandboxedCommands": True
            }
        }

    def create_production_config(self):
        return {
            "sandbox": {
                "enabled": True,
                "filesystem": {
                    "allowedWritePaths": ["${workspaceFolder}/build", "/tmp"],
                    "deniedPaths": [
                        "/etc",
                        "/root",
                        "~/.ssh",
                        "~/.aws",
                        "~/.config",
                        "${workspaceFolder}/src"
                    ]
                },
                "network": {
                    "allowedDomains": [
                        "api.anthropic.com",
                        "code.claude.com",
                        "*.prod.company.com"
                    ]
                },
                "allowUnsandboxedCommands": False,
                "enableWeakerNestedSandbox": False
            }
        }

使用示例

manager = SandboxConfigManager()

创建开发环境配置

bash
manager.create_config('development', manager.create_development_config())

创建生产环境配置

bash
manager.create_config('production', manager.create_production_config())

34.2.8 故障排查

常见问题

问题 1:沙箱阻止了合法操作

查看沙箱日志

tail -f /var/log/claude-sandbox/sandbox-$(date +%Y-%m-%d).log

临时禁用沙箱

/sandbox disable

添加允许的路径或域名

在 settings.json 中更新配置

问题 2:命令执行被拒绝

检查命令是否在排除列表中

/sandbox config

将命令添加到排除列表

在 settings.json 中添加到 "excludedCommands"

问题 3:网络连接问题

测试 DNS 解析

dig api.anthropic.com

检查代理配置

echo $HTTP_PROXY echo $HTTPS_PROXY

测试网络连接

curl -v https://api.anthropic.com

问题 4:文件权限问题

检查文件权限

ls -la /workspace

修复权限

chmod 755 /workspace chown developer:developer /workspace

34.2.9 与其他安全功能集成

与 IAM 策略集成

json
{
  "sandbox": {
    "enabled": true,
    "filesystem": {
      "allowedWritePaths": ["${workspaceFolder}"],
      "deniedPaths": ["/etc", "/root", "~/.ssh", "~/.aws"]
    },
    "network": {
      "allowedDomains": ["api.anthropic.com", "code.claude.com"]
    }
  },
  "permissions": {
    "fileAccess": {
      "allowedPaths": ["${workspaceFolder}"],
      "deniedPaths": ["/etc", "/root", "~/.ssh", "~/.aws"]
    },
    "networkAccess": {
      "allowedDomains": ["api.anthropic.com", "code.claude.com"]
    }
  }
}

与开发容器集成

json
{

"name": "Claude Code Enterprise Dev Container", "dockerFile": "Dockerfile", "customizations": { "vscode": { "settings": { "claude-code.sandbox.enabled": true, "claude-code.sandbox.filesystem.allowedWritePaths": [ "${workspaceFolder}", "/tmp" ], "claude-code.sandbox.network.allowedDomains": [ "api.anthropic.com", "code.claude.com", "github.com" ] } } }, "postCreateCommand": "bash .devcontainer/init-sandbox.sh" }

基于 MIT 许可发布