AP反制

分类与反制配置举例

1. 组网需求

如图1-3所示，AP通过交换机与AC相连，AP1和AP2为Client提供无线服务，SSID为“abc”，在Sensor上开启WIPS功能，配置分类策略，将非法客户端的MAC地址（000f-1c35-12a5）添加到静态禁用列表中，将SSID“abc”添加到静态信任列表中，要求对检测到的潜在外部AP和未授权客户端进行反制。

2. 组网图

图1-3 WIPS分类与反制组网图

3. 配置步骤

在AC上完成无线服务的相关配置，具体配置步骤可参见“WLAN配置指导”中的“WLAN接入”，此处不再重复。

# 配置虚拟安全域vsd1。

<AC> system-view

[AC] wips

[AC-wips] virtual-security-domain vsd1

[AP-wips-vsd-vsd1] quit

[AC-wips] quit

# 创建AP名称为Sensor，开启WIPS功能。

[AC] wlan ap Sensor model WA4320i-ACN

[AC-wlan-ap-Sensor] serial-id 210235A1GQB139000435

[AC-wlan-ap-Sensor] radio 1

[AC-wlan-ap-Sensor-radio-1] radio enable

[AC-wlan-ap-Sensor-radio-1] wips enable

[AC-wlan-ap-Sensor-radio-1] quit

# 配置Sensor加入虚拟安全域vsd1。

[AC-wlan-ap-Sensor] wips virtual-security-domain vsd1

[AC-wlan-ap-Sensor] quit

# 配置分类策略class1，将Client 2的MAC地址配置禁用MAC地址，并且将名为“abc”的SSID配置为信任SSID。

[AC] wips

[AC-wips] classification policy class1

[AC-wips-cls-class1] block mac-address 000f-1c35-12a5

[AC-wips-cls-class1] trust ssid abc

[AC-wips-cls-class1] quit

# 虚拟安全域vsd1应用分类策略class1。

[AC-wips] virtual-security-domain vsd1

[AC-wips-vsd-vsd1] apply classification policy class1

[AC-wips-vsd-vsd1] quit

# 配置反制策略protect，反制未授权客户端和潜在外部AP。

[AC-wips] countermeasure policy protect

[AC-wips-cms-protect] countermeasure unauthorized-client

[AC-wips-cms-protect] countermeasure potential-external-ap

[AC-wips-cms-protect] quit

# 虚拟安全域vsd1应用反制策略protect。

[AC-wips] virtual-security-domain vsd1

[AC-wips-vsd-vsd1] apply countermeasure policy protect

[AC-wips-vsd-vsd1] quit

[AC-wips] quit

4. 验证配置

(1)     通过display wips virtual-security-domain命令查看无线设备的分类结果。

[AC] display wips virtual-security-domain vsd1 device

Total 3 detected devices in virtual-security-domain vsd1

Class: Auth - authorization; Ext - extern; Mis - mistake;

       Unauth - unauthorized; Uncate - uncategorized;

       (A) - associate; (C) - config; (P) - potential

MAC address    Type   Class    Duration    Sensors Channel Status

00e0-fc00-5829 AP     Auth     00h 10m 24s 1       149     Active

000f-e228-2528 AP     Auth     00h 10m 04s 1       149     Active

000f-e223-1616 AP     Ext(P)   00h 10m 46s 1       149     Active

000f-1c35-12a5 Client Unauth   00h 10m 02s 1       149     Active

000f-e201-0102 Client Auth     00h 10m 02s 1       149     Active

在虚拟安全域vsd1，MAC地址为000f-e223-1616的AP被分类成潜在外部AP，MAC地址为000f-1c35-12a5的客户端被分类为未授权的客户端。

(2)     通过命令行display wips virtual-security-domain vsd1 countermeasure record命令查看反制过的设备记录信息。

[AC] display wips virtual-security-domain vsd1 countermeasure record

Total 2 times countermeasure, current 2 countermeasure record in virtual-security-domain vsd1

Reason: Attack; Ass - associated; Black - blacklist;                           

        Class - classification; Manu - manual;                                 

MAC address    Type   Reason   Countermeasure AP      Radio ID   Time          

000f-e223-1616 AP     Class    Sensor                 1          2014-06-03/10:30:36

000f-1c35-12a5 Client Class    Sensor                 1          2014-06-03/09:13:26

在虚拟安全域vsd1，MAC地址为000f-1c35-12a5的未授权客户端和MAC地址为000f-e223-1616的潜在外部AP被反制。

1.15.2  WIPS畸形报文检测和泛洪攻击检测配置举例

1. 组网需求

如图1-4所示，AP通过交换机与AC相连，将两台AP分别配置为Sensor，配置虚拟安全域VSD_1，并配置两台Sensor属于这个虚拟安全域，当检测到攻击者对无线网络进行IE重复的畸形报文或Beacon帧泛洪攻击时，AP向AC发送告警信息。

2. 组网图

图1-4 畸形报文检测和泛洪攻击检测组网图

3. 配置步骤

在AC上完成无线服务的相关配置，具体配置步骤可参见“WLAN配置指导”中的“WLAN接入”，此处不再重复。

# 创建AP名称为sensor1，开启WIPS功能。

<AC> system-view

[AC] wlan ap sensor1 model WA4320i-ACN

[AC-wlan-ap-sensor1] serial-id 210235A1GQB139000435

[AC-wlan-ap-sensor1] radio 1

[AC-wlan-ap-sensor1-radio-1] radio enable

[AC-wlan-ap-sensor1-radio-1] wips enable

[AC-wlan-ap-sensor1-radio-1] return

# 创建AP名称为sensor2，开启WIPS功能。

<AC> system-view

[AC] wlan ap sensor2 model WA4320i-ACN

[AC-wlan-ap-sensor2] serial-id 210235A1GQB139000436

[AC-wlan-ap-sensor2] radio 1

[AC-wlan-ap-sensor2-radio-1] radio enable

[AC-wlan-ap-sensor2-radio-1] wips enable

[AC-wlan-ap-sensor2-radio-1] quit

[AC-wlan-ap-sensor2] quit

# 配置虚拟安全域VSD_1。

[AC] wips

[AC-wips] virtual-security-domain VSD_1

[AP-wips-vsd-VSD_1] quit

# 创建攻击检测策略，当检测到IE重复的畸形报文和Beacon帧泛洪攻击时，向AC发送日志信息或告警信息。检测IE重复的畸形报文的静默时间为50秒，检测Beacon帧的统计周期为100秒，触发阈值为200，静默时间为50秒。

[AC-wips] detect policy dtc1

[AC-wips-dtc-dtc1] malformed duplicated-ie quiet 50

[AC-wips-dtc-dtc1] flood beacon interval 100 quiet 50 threshold 200

[AC-wips-dtc-dtc1] quit

# 在虚拟安全域VSD_1上应用攻击检测策略。

[AC-wips] virtual-security-domain VSD_1

[AC-wips-vsd-VSD_1] apply detect policy dtc1

[AC-wips-vsd-VSD_1] quit

[AC-wips] quit

# 配置sensor1加入虚拟安全域VSD_1。

[AC] wlan ap sensor1

[AC-wlan-ap-sensor1] wips virtual-security-domain VSD_1

[AC-wlan-ap-sensor1] quit

# 配置sensor2加入虚拟安全域VSD_1。

[AC] wlan ap sensor2

[AC-wlan-ap-sensor2] wips virtual-security-domain VSD_1

[AC-wlan-ap-sensor2] return

4.  验证结果

(1)     当网络中没有攻击者时，在AC上通过命令行display wips statistics receive命令查看收到报文的统计信息，畸形报文和泛洪报文的统计个数为0。

<AC> display wips statistics receive

Information from sensor 1

Information about attack statistics:

Detected association-request flood messages: 0

Detected authentication flood messages: 0

Detected beacon flood messages: 0

Detected block-ack flood messages: 0

Detected cts flood messages: 0

Detected deauthentication flood messages: 0

Detected disassociation flood messages: 0

Detected eapol-start flood messages: 0

Detected null-data flood messages: 0

Detected probe-request flood messages: 0

Detected reassociation-request flood messages: 0

Detected rts flood messages: 0

Detected duplicated-ie messages: 0

Detected fata-jack messages: 0

Detected illegal-ibss-ess messages: 0

Detected invalid-address-combination messages: 0

Detected invalid-assoc-req messages: 0

Detected invalid-auth messages: 0

Detected invalid-deauth-code messages: 0

Detected invalid-disassoc-code messages: 0

Detected invalid-ht-ie messages: 0

Detected invalid-ie-length messages: 0

Detected invalid-pkt-length messages: 0

Detected large-duration messages: 0

Detected null-probe-resp messages: 0

Detected overflow-eapol-key messages: 0

Detected overflow-ssid messages: 0

Detected redundant-ie messages: 0

Detected AP spoof AP messages: 0

Detected AP spoof client messages: 0

Detected AP spoof ad-hoc messages: 0

Detected ad-hoc spoof AP messages: 0

Detected client spoof AP messages: 0

Detected weak IV messages: 0

Detected excess AP messages: 0

Detected excess client messages: 0

Detected sig rule messages: 0

Information from sensor 2

Information about attack statistics:

Detected association-request flood messages: 0

Detected authentication flood messages: 0

Detected beacon flood messages: 0

Detected block-ack flood messages: 0

Detected cts flood messages: 0

Detected deauthentication flood messages: 0

Detected disassociation flood messages: 0

Detected eapol-start flood messages: 0

Detected null-data flood messages: 0

Detected probe-request flood messages: 0

Detected reassociation-request flood messages: 0

Detected rts flood messages: 0

Detected duplicated-ie messages: 0

Detected fata-jack messages: 0

Detected illegal-ibss-ess messages: 0

Detected invalid-address-combination messages: 0

Detected invalid-assoc-req messages: 0

Detected invalid-auth messages: 0

Detected invalid-deauth-code messages: 0

Detected invalid-disassoc-code messages: 0

Detected invalid-ht-ie messages: 0

Detected invalid-ie-length messages: 0

Detected invalid-pkt-length messages: 0

Detected large-duration messages: 0

Detected null-probe-resp messages: 0

Detected overflow-eapol-key messages: 0

Detected overflow-ssid messages: 0

Detected redundant-ie messages: 0

Detected AP spoof AP messages: 0

Detected AP spoof client messages: 0

Detected AP spoof ad-hoc messages: 0

Detected ad-hoc spoof AP messages: 0

Detected client spoof AP messages: 0

Detected weak IV messages: 0

Detected excess AP messages: 0

Detected excess client messages: 0

Detected sig rule messages: 0

(2)     当检测到IE重复的畸形报文和Beacon帧泛洪攻击时，在AC上通过命令行display wips statistics receive查看收到报文的统计信息，IE重复的畸形报文的统计个数为28和Beacon帧泛洪攻击的统计个数为18。

<AC> display wips statistics receive

Information from sensor 1

Information about attack statistics:

Detected association-request flood messages: 0

Detected authentication flood messages: 0

Detected beacon flood messages: 18

Detected block-ack flood messages: 0

Detected cts flood messages: 0

Detected deauthentication flood messages: 0

Detected disassociation flood messages: 0

Detected eapol-start flood messages: 0

Detected null-data flood messages: 0

Detected probe-request flood messages: 0

Detected reassociation-request flood messages: 0

Detected rts flood messages: 0

Detected duplicated-ie messages: 0

Detected fata-jack messages: 0

Detected illegal-ibss-ess messages: 0

Detected invalid-address-combination messages: 0

Detected invalid-assoc-req messages: 0

Detected invalid-auth messages: 0

Detected invalid-deauth-code messages: 0

Detected invalid-disassoc-code messages: 0

Detected invalid-ht-ie messages: 0

Detected invalid-ie-length messages: 0

Detected invalid-pkt-length messages: 0

Detected large-duration messages: 0

Detected null-probe-resp messages: 0

Detected overflow-eapol-key messages: 0

Detected overflow-ssid messages: 0

Detected redundant-ie messages: 0

Detected AP spoof AP messages: 0

Detected AP spoof client messages: 0

Detected AP spoof ad-hoc messages: 0

Detected ad-hoc spoof AP messages: 0

Detected client spoof AP messages: 0

Detected weak IV messages: 0

Detected excess AP messages: 0

Detected excess client messages: 0

Detected sig rule messages: 0

Information from sensor 2

Information about attack statistics:

Detected association-request flood messages: 0

Detected authentication flood messages: 0

Detected beacon flood messages: 0

Detected block-ack flood messages: 0

Detected cts flood messages: 0

Detected deauthentication flood messages: 0

Detected disassociation flood messages: 0

Detected eapol-start flood messages: 0

Detected null-data flood messages: 0

Detected probe-request flood messages: 0

Detected reassociation-request flood messages: 0

Detected rts flood messages: 0

Detected duplicated-ie messages: 28

Detected fata-jack messages: 0

Detected illegal-ibss-ess messages: 0

Detected invalid-address-combination messages: 0

Detected invalid-assoc-req messages: 0

Detected invalid-auth messages: 0

Detected invalid-deauth-code messages: 0

Detected invalid-disassoc-code messages: 0

Detected invalid-ht-ie messages: 0

Detected invalid-ie-length messages: 0

Detected invalid-pkt-length messages: 0

Detected large-duration messages: 0

Detected null-probe-resp messages: 0

Detected overflow-eapol-key messages: 0

Detected overflow-ssid messages: 0

Detected redundant-ie messages: 0

Detected AP spoof AP messages: 0

Detected AP spoof client messages: 0

Detected AP spoof ad-hoc messages: 0

Detected ad-hoc spoof AP messages: 0

Detected client spoof AP messages: 0

Detected weak IV messages: 0

Detected excess AP messages: 0

Detected excess client messages: 0

Detected sig rule messages: 0