配置 Cisco Secure Client VPN 作为企业访问方案，需要按照以下步骤操作。以下是详细的步骤说明和注意事项

端口和端口IP配置

• 端口IP配置：

  • 在 config/cisco Secure Client VPN 中，设置端口IP，端口IP应与企业内部的内网IP一致,确保访问时不会被封禁。
  • 示例：

    cisco Secure Client VPN
    [config]
    secure_client VPN config
    use
    security
    endpoint ip
    [end]
    endpoint ip
    [end]
    [end]

• 安全端口配置：

  • 设置安全端口以控制访问：

    cisco Secure Client VPN
    [config]
    secure_client VPN config
    use
    security
    security
    secure
    endpoint ip
    [end]
    endpoint ip
    [end]
    [end]

安全策略配置

基本安全策略

• 防火墙规则：
  • 设置防火墙规则来控制访问：

    cisco Secure Client VPN
    [config]
    secure_client VPN config
    use
    security
    firewall
    firewall rules
    [firewall rules]
    [firewall rules]
    rule name
    rule type
    rule description
    rule port
    rule source ip
    rule destination ip
    rule source mask
    rule destination mask
    rule action
    [firewall rules]
    [firewall rules]
    rule name "端口安全规则"
    rule type "enable"
    rule description "允许通过该端口的访问"
    rule port "端口IP"
    rule source ip "企业内网IP"
    rule destination ip "端口IP"
    rule source mask "124"
    rule destination mask "124"
    rule action "连接"
    [firewall rules]

  • 允许通过端口 IP 22 的访问：

    rule name "端口安全规则"
    rule type "enable"
    rule description "允许通过该端口的访问"
    rule port "22"
    rule source ip "192.168.1.1"
    rule destination ip "端口IP"
    rule source mask "255.255.255."
    rule destination mask "255.255.255."
    rule action "连接"

  • 防火墙阻止DSSDDoS：

    rule name "阻止DSSDDoS"
    rule type "enable"
    rule description "阻止DSSDDoS攻击"
    rule port "端口IP"
    rule source ip "企业内网IP"
    rule destination ip "端口IP"
    rule action "拒绝"

  • 阻止DSSDDoS_rev：

    rule name "阻止DSSDDoS_rev"
    rule type "enable"
    rule description "阻止DSSDDoS_rev攻击"
    rule port "端口IP"
    rule source ip "企业内网IP"
    rule destination ip "端口IP"
    rule action "拒绝"

高级安全策略

• 安全端口规则：
  • 确保安全端口只能访问特定的内网IP和IP段：

    rule name "安全端口规则"
    rule type "enable"
    rule description "允许通过安全端口的访问"
    rule port "端口IP"
    rule source ip "端口IP"
    rule destination ip "端口IP"
    rule source mask "192.168.1.1/24"
    rule destination mask "192.168.1.1/24"
    rule action "连接"
    rule action type "连接"
    rule action description "允许通过安全端口的访问"
    rule action description_end
    rule action action "连接"
    [安全端口规则]

  • 阻止DSSDDoS和DSSDDoS_rev：

    rule name "阻止DSSDDoS"
    rule type "enable"
    rule description "阻止DSSDDoS攻击"
    rule port "端口IP"
    rule source ip "端口IP"
    rule destination ip "端口IP"
    rule source mask "192.168.1.1/24"
    rule destination mask "192.168.1.1/24"
    rule action "拒绝"
    rule action action "拒绝"
    rule action type "拒绝"
    rule action description "阻止DSSDDoS攻击"
    rule action description_end
    rule action description "阻止DSSDDoS_rev攻击"
    rule action description_end
    rule action action "拒绝"
    rule action action type "拒绝"
    rule action action description "阻止DSSDDoS_rev攻击"
    [阻止DSSDDoS]
    [阻止DSSDDoS_rev]

虚拟私网络配置

虚拟私网络地址配置

• 设置虚拟私网络地址：

  cisco Secure Client VPN
  [config]
  secure_client VPN config
  use
  security
  private network
  private network address
  private network ip range
  private network mask
  private network mask
  private network mask
  private network mask
  [private network]
  [private network]

虚拟私网络端口IP配置

• 确保端口IP与企业内网一致：

  cisco Secure Client VPN
  [config]
  secure_client VPN config
  use
  security
  private network
  private network address
  private network ip range
  private network mask
  private network mask
  private network mask
  private network mask
  [private network]
  [private network]
  rule name "虚拟私网络端口规则"
  rule type "enable"
  rule description "允许通过该端口的访问"
  rule port "端口IP"
  rule source ip "端口IP"
  rule destination ip "端口IP"
  rule source mask "128.../"
  rule destination mask "128.../"
  rule action "连接"
  [虚拟私网络端口规则]

虚拟私网络端口IP范围配置

• 设置端口IP范围，确保仅访问企业范围：

  cisco Secure Client VPN
  [config]
  secure_client VPN config
  use
  security
  private network
  private network address
  private network ip range
  private network mask
  private network mask
  private network mask
  private network mask
  [private network]
  [private network]
  rule name "虚拟私网络端口IP范围规则"
  rule type "enable"
  rule description "端口IP只能访问企业范围"
  rule port "端口IP"
  rule source ip "企业内网IP"
  rule destination ip "企业内网IP"
  rule source mask "255.255.255."
  rule destination mask "255.255.255."
  rule action "连接"
  [虚拟私网络端口IP范围规则]

虚拟私网络配置

• 确保虚拟私网络的地址、IP范围、端口IP和端口IP范围正确设置。
• 检查防火墙规则和安全策略是否正确配置。

测试配置

• 防火墙规则测试：确保安全策略不会阻止正常访问。
• 虚拟私网络测试：确保端口IP和端口IP范围正确,DSSDDoS攻击无法通过。

通过以上步骤，您可以配置Cisco Secure Client VPN 为企业访问方案，确保端口安全、端口IP设置正确,以及能够有效防止DDoS攻击。