使用 Port Security feature 防范MAC/CAM攻击

本文介绍了思科PortSecurity功能的配置方法,该功能能够有效防止MAC和MAC/CAM攻击。文章详细阐述了如何设置端口上的MAC地址数量限制、违规处理方式以及使用Sticky PortSecurity保存MAC地址配置等内容。

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思科 Port Security feature 可以防止 MAC 和 MAC/CAM 攻击。通过配置 Port Security 可以控制:

• 端口上最大可以通过的 MAC 地址数量

• 端口上学习或通过哪些 MAC 地址

• 对于超过规定数量的 MAC 处理进行违背处理

端口上学习或通过哪些 MAC 地址,可以通过静态手工定义,也可以在交换机自动学习。交换机动态学习端口 MAC ,直到指定的 MAC 地址数量,交换机关机后重新学习。目前较新的技术是 Sticky Port Security ,交换机将学到的 mac 地址写到端口配置中,交换机重启后配置仍然存在。

对于超过规定数量的 MAC 处理进行处理一般有三种方式(针对交换机型号会有所不同):

• Shutdown 。这种方式保护能力最强,但是对于一些情况可能会为管理带来麻烦,如某台设备中了病毒,病毒间断性伪造源 MAC 在网络中发送报文。

• Protect 。丢弃非法流量,不报警。

• Restrict 。丢弃非法流量,报警,对比上面会是交换机 CPU 利用率上升但是不影响交换机的正常使用。推荐使用这种方式。

1.4配置

port-security 配置选项:

Switch(config-if)# switchport port-security ?

aging Port-security aging commands

mac-address Secure mac address

maximum Max secure addresses

violation Security violation mode


配置 port-security 最大 mac 数目,违背处理方式,恢复方法

Cat4507(config)#int fastEthernet 3/48

Cat4507 (config-if)#switchport port-security

Cat4507 (config-if)#switchport port-security maximum 2

Cat4507 (config-if)#switchport port-security violation shutdown

Cat4507 (config)#errdisable recovery cause psecure-violation

Cat4507 (config)#errdisable recovery interval 30


通过配置 sticky port-security学得的MAC

interface FastEthernet3/29

switchport mode access

switchport port-security

switchport port-security maximum 5

switchport port-security mac-address sticky

switchport port-security mac-address sticky 000b.db1d.6ccd

switchport port-security mac-address sticky 000b.db1d.6cce

switchport port-security mac-address sticky 000d.6078.2d95

switchport port-security mac-address sticky 000e.848e.ea01
 
#include <WiFi.h> #include "esp_camera.h" #include <shibie_inferencing.h> #include "edge-impulse-sdk/dsp/image/image.hpp" #include "freertos/semphr.h" // 互斥锁头文件 #include "esp_task_wdt.h" #include "freertos/task.h" #include "esp_http_server.h" // 摄像头引脚配置(根据实际硬件调整) // OLED配置 #include <Adafruit_SSD1306.h> #include <Adafruit_GFX.h> #define SCREEN_WIDTH 128 #define SCREEN_HEIGHT 64 Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1); // Edge Impulse模型 static ei_impulse_result_t result; // 存储推理结果 // 摄像头配置(匹配模型输入) static camera_config_t camera_config = { .pixel_format = PIXFORMAT_GRAY, // 灰度图减少处理负载 .frame_size = FRAMESIZE_96X96, // 匹配Edge Impulse输入尺寸 .jpeg_quality = 10, // 高压缩率 .fb_count = 1, .fb_location = CAMERA_FB_IN_PSRAM }; void setup() { // 初始化摄像头(参考之前代码) if(esp_camera_init(&camera_config) != ESP_OK) { Serial.println("摄像头初始化失败"); while(1) delay(100); } // 初始化OLED Wire.begin(14, 15); // SDA=GPIO14, SCL=GPIO15 if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { Serial.println("OLED初始化失败"); } display.clearDisplay(); display.setTextSize(1); display.setTextColor(WHITE); // 初始化Edge Impulse ei_printf("Edge Impulse推理引擎启动\n"); } void loop() { camera_fb_t *fb = esp_camera_fb_get(); // 捕获图像 if(!fb) return; // 图像预处理(转换为模型输入格式) signal_t signal; signal.total_length = fb->len; signal.get_data = &raw_feature_get_data; // Edge Impulse推理 EI_IMPULSE_ERROR res = run_classifier(&signal, &result, false); if(res != EI_IMPULSE_OK) { display.clearDisplay(); display.setCursor(0,0); display.print("推理错误!"); display.display(); return; } // 在OLED显示结果 display.clearDisplay(); display.setCursor(0,0); display.print("检测到: "); display.println(result.classification[0].label); display.printf("置信度: %.1f%%", result.classification[0].value*100); display.display(); esp_camera_fb_return(fb); // 释放内存 delay(1000); // 控制识别频率 } // 图像数据转换回调 static int raw_feature_get_data(size_t offset, size_t length, float *out_ptr) { size_t pixel_ix = offset * 2; for(size_t i = 0; i < length; i++) { out_ptr[i] = (fb->buf[pixel_ix] << 8) | fb->buf[pixel_ix+1]; // 灰度转float pixel_ix += 2; } return 0; }... 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"-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_serial_slave_link/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_websocket_client/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/expat/expat/expat/lib" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/expat/port/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/wear_levelling/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/fatfs/diskio" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/fatfs/vfs" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/fatfs/src" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/freemodbus/common/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/idf_test/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/idf_test/include/esp32" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/jsmn/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/json/cJSON" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/libsodium/libsodium/src/libsodium/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/libsodium/port_include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/mqtt/esp-mqtt/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/openssl/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/perfmon/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/spiffs/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/ulp/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/wifi_provisioning/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/button/button/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/rmaker_common/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/json_parser/upstream/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/json_parser/upstream" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/json_generator/upstream" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_schedule/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_rainmaker/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/qrcode/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/ws2812_led" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/dotprod/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/support/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/hann/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman_harris/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/blackman_nuttall/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/nuttall/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/windows/flat_top/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/iir/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/fir/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/add/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/sub/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/mul/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/addc/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/mulc/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/math/sqrt/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/matrix/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/fft/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/dct/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/conv/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/common/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/kalman/ekf/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dsp/modules/kalman/ekf_imu13states/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_littlefs/src" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp_littlefs/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/tool" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/typedef" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/image" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/math" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/nn" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/layer" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/detect" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-dl/include/model_zoo" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-sr/esp-tts/esp_tts_chinese/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp-sr/include/esp32" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp32-camera/driver/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/esp32-camera/conversions/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/include/fb_gfx/include" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4/tools/sdk/esp32/qio_qspi/include" -mlongcalls -Wno-frame-address -ffunction-sections -fdata-sections -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=deprecated-declarations -Wno-unused-parameter -Wno-sign-compare -ggdb -Os -freorder-blocks -Wwrite-strings -fstack-protector -fstrict-volatile-bitfields -Wno-error=unused-but-set-variable -fno-jump-tables -fno-tree-switch-conversion -std=gnu++11 -fexceptions -fno-rtti -MMD -c -w -DF_CPU=240000000L -DARDUINO=10607 -DARDUINO_ESP32_DEV -DARDUINO_ARCH_ESP32 "-DARDUINO_BOARD=\"ESP32_DEV\"" "-DARDUINO_VARIANT=\"esp32\"" -DARDUINO_PARTITION_huge_app -DESP32 -DCORE_DEBUG_LEVEL=0 -DBOARD_HAS_PSRAM -mfix-esp32-psram-cache-issue -mfix-esp32-psram-cache-strategy=memw -DARDUINO_USB_CDC_ON_BOOT=0 "@C:\\Users\\11016\\AppData\\Local\\arduino\\sketches\\0EEE3D2B537D80DA7537EC51C47A096B/build_opt.h" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4\\cores\\esp32" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4\\variants\\esp32" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4\\libraries\\WiFi\\src" "-Ic:\\Users\\11016\\Documents\\Arduino\\libraries\\shibie_inferencing\\src" "-Ic:\\Users\\11016\\Documents\\Arduino\\libraries\\Adafruit_SSD1306" "-Ic:\\Users\\11016\\Documents\\Arduino\\libraries\\Adafruit_GFX_Library" "-Ic:\\Users\\11016\\Documents\\Arduino\\libraries\\Adafruit_BusIO" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4\\libraries\\Wire\\src" "-IC:\\Users\\11016\\AppData\\Local\\Arduino15\\packages\\esp32\\hardware\\esp32\\2.0.4\\libraries\\SPI\\src" "C:\\Users\\11016\\AppData\\Local\\arduino\\sketches\\0EEE3D2B537D80DA7537EC51C47A096B\\sketch\\sketch_jul18c.ino.cpp" -o "C:\\Users\\11016\\AppData\\Local\\arduino\\sketches\\0EEE3D2B537D80DA7537EC51C47A096B\\sketch\\sketch_jul18c.ino.cpp.o" C:\Users\11016\Desktop\sketch_jul18c\sketch_jul18c.ino:22:19: error: 'PIXFORMAT_GRAY' was not declared in this scope .pixel_format = PIXFORMAT_GRAY, // 灰度图减少处理负载 ^~~~~~~~~~~~~~ C:\Users\11016\Desktop\sketch_jul18c\sketch_jul18c.ino:22:19: note: suggested alternative: 'PIXFORMAT_RAW' .pixel_format = PIXFORMAT_GRAY, // 灰度图减少处理负载 ^~~~~~~~~~~~~~ PIXFORMAT_RAW C:\Users\11016\Desktop\sketch_jul18c\sketch_jul18c.ino: In function 'int raw_feature_get_data(size_t, size_t, float*)': C:\Users\11016\Desktop\sketch_jul18c\sketch_jul18c.ino:84:19: error: 'fb' was not declared in this scope out_ptr[i] = (fb->buf[pixel_ix] << 8) | fb->buf[pixel_ix+1]; // 灰度转float ^~ Using library WiFi at version 2.0.0 in folder: C:\Users\11016\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.4\libraries\WiFi Using library shibie_inferencing at version 1.0.1 in folder: C:\Users\11016\Documents\Arduino\libraries\shibie_inferencing Using library Adafruit SSD1306 at version 2.5.15 in folder: C:\Users\11016\Documents\Arduino\libraries\Adafruit_SSD1306 Using library Adafruit GFX Library at version 1.12.1 in folder: C:\Users\11016\Documents\Arduino\libraries\Adafruit_GFX_Library Using library Adafruit BusIO at version 1.17.2 in folder: C:\Users\11016\Documents\Arduino\libraries\Adafruit_BusIO Using library Wire at version 2.0.0 in folder: C:\Users\11016\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.4\libraries\Wire Using library SPI at version 2.0.0 in folder: C:\Users\11016\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.4\libraries\SPI exit status 1 Compilation error: 'PIXFORMAT_GRAY' was not declared in this scope
最新发布
07-22
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