这篇文章主要围绕c#–如何在.Net中检测(路由器/网关的)公共IP地址的变化？和c#检测网络展开，旨在为您提供一份详细的参考资料。我们将全面介绍c#–如何在.Net中检测(路由器/网关的)公共IP地
这篇文章主要围绕c# – 如何在.Net中检测(路由器/网关的)公共IP地址的变化？和c#检测网络展开，旨在为您提供一份详细的参考资料。我们将全面介绍c# – 如何在.Net中检测(路由器/网关的)公共IP地址的变化？的优缺点，解答c#检测网络的相关问题，同时也会为您带来4K 解码 + 路由器 + HDMI 收发 ARM 4核64bit、API 网关的 Lambda 路由器、CCNP(BCMSN)实验：VRRP多组综合实验(路由器)、Cisco 交换机/路由器 ssh 配置的实用方法。
本文目录一览：- c# – 如何在.Net中检测(路由器/网关的)公共IP地址的变化？（c#检测网络）
- 4K 解码 + 路由器 + HDMI 收发 ARM 4核64bit
- API 网关的 Lambda 路由器
- CCNP(BCMSN)实验：VRRP多组综合实验(路由器)
- Cisco 交换机/路由器 ssh 配置
c# – 如何在.Net中检测(路由器/网关的)公共IP地址的变化？（c#检测网络）
检测网关公共IP地址的最佳方法是什么？据推测,必须通过轮询外部可靠地址来做到这一点,例如google.com ……？
解决方法
4K 解码 + 路由器 + HDMI 收发 ARM 4核64bit
日前蓝莓电子技术有限公司宣布推出Blueberry Pi (A)，它是基于Realtek 129x处理器设计,套件基于Linaro的96board规范.
Blueberry Pi的亮点包括：
系统和外围：
ARM Cortex-A53 Quad-Core processor with floating-point unit and NEON SIMD engine embedded, supporting the 64/32-bit ARMv8 architecture
ARM T820 GPU – Mali-450 8-core equivalent
Supports SATA III
Supports PCI Express1.1/2.0
Supports SDIO 3.0 interface
...
独立音视频DSP
Video DSP with HW acceleration
Decoding:
H.265 MP@L5.1 Main Tier
VP9 Profile 0
...
Encoding:
MPEG 4 SP@L5
H.264 BP, MP, HP@L4.2
H.264 MVC SHP 1080@30P
Audio DSP with HW acceleration
Decoding:
7.1 CH down-mix
MPEG I Layer 1, 2, 3 (2-CH) and MPEG II Layer 1, 2 (Multi-Channel)
LPCM, ADPCM, ALAC, FLAC, AAC, WAV, AIFF, VSELP, and OGG Vorbis
DTS HD, Dolby Digital Plus, TrueHD
WMA/WMA Pro, Dolby Digital AC3, and DTS
Recording:
LPCM/ADPCM/MP3/AAC audio recording
网络接口:
Supports RGMII/SGMII
Integrates 10/100/1000 Ethernet MAC and PHY
Integrates hardware NAT and IP6 engine for AP router application
存储接口:
Integrates USB3.0 Super Speed Dual-Role Device controller and PHY
with supports for Type C receptacle
HDMI 输出:
HDMI2.0a/MHL3.0,HDCP,and DVI 1.0 compliant transmitter
HDMI 输入:
One-chanel HDMI 2.0a compliant receiver
Supports video format up to 4K x 2k@59.94/60HZ
系统软件:
支持Android 6.x/Linux + OpenWrt
alex@blueberry-tek.com
13509624205
API 网关的 Lambda 路由器
如何解决API 网关的 Lambda 路由器
我目前正在将 SAM 模板用于具有 lambda 集成的 API 网关，但我们遇到了一个限制，这对许多人来说似乎是一个问题。根据 this post 中的 AWS 工程师的说法，使用 proxy+ 是最适合我们用例的解决方案。但是，我们使用事件的资源键来进行内部路由。由于所有路径现在都有 /{proxy+} 资源，我们可能需要使用路径键进行路由。
谁能建议一个好的库或方法来根据路径确定资源？
我们当前的内部路由是这样的：
if event["resource"] == "/{xxx}/path1/{yyy}/path2/{zzzz}":"do something"
现在我想从路径中导出“资源”。路径将如下所示：
"basepath/5/path1/45/path2/333"
我看到了 this library，但它似乎没有做我们需要的。我问的甚至可能吗？或者有人可以建议一种优雅的方式来处理基于路径的多个资源的内部路由？
CCNP(BCMSN)实验：VRRP多组综合实验(路由器)
第一步：配置R2，R4和R5
R2上的配置：
interface Loopback0
ip address 2.2.2.2 255.255.255.0
!
interface FastEthernet0/0
ip address 12.0.0.2 255.255.255.0
!
interface FastEthernet1/0
ip address 23.0.0.2 255.255.255.0
!
router rip
version 2
network 2.0.0.0
network 12.0.0.0
network 23.0.0.0
no auto-summary
R4上的配置：
interface FastEthernet0/0
ip address 192.168.1.4 255.255.255.0
ip default-gateway 192.168.1.254
R5上的配置：
interface FastEthernet0/0
ip address 192.168.1.5 255.255.255.0
ip default-gateway 192.168.1.253
第二步：配置R1
track 100 interface FastEthernet0/0 line-protocol
//通过track 后面为组号，接着为要追踪的接口
interface FastEthernet0/0
ip address 12.0.0.1 255.255.255.0
!
interface FastEthernet0/1
ip address 192.168.1.1 255.255.255.0
no ip redirects
no ip proxy-arp
//上面两句为关闭重定向，和关闭代理arp
//我们在下面定义了两个组
vrrp 1 ip 192.168.1.254
vrrp 1 priority 105
vrrp 1 track 100
//这里和hsrp不同的是，vrrp要在全局下先定义，然后在这里调用，不然调用不起来
vrrp 2 ip 192.168.1.253
!
router rip
version 2
network 12.0.0.0
network 192.168.1.0
no auto-summary
第三步：配置R3
track 200 interface FastEthernet0/0 line-protocol
!
!
!
!
!
interface FastEthernet0/0
ip address 23.0.0.3 255.255.255.0
shutdown
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.1.3 255.255.255.0
no ip redirects
no ip proxy-arp
duplex auto
speed auto
vrrp 1 ip 192.168.1.254
vrrp 2 ip 192.168.1.253
vrrp 2 priority 105
vrrp 2 track 200
!
router rip
version 2
network 23.0.0.0
network 192.168.1.0
no auto-summary
第四步：调试
当网络正常时：在R1和R3上的case
R1#sh vrrp
FastEthernet0/1 - Group 1
State is Master
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 105
Track object 100 state Up decrement 10
Master Router is 192.168.1.1 (local), priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.3, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.009 sec)
R3#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.1, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 2.689 sec)
FastEthernet0/1 - Group 2
State is Master
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 105
Track object 200 state Up decrement 10
Master Router is 192.168.1.3 (local), priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec
第五步：一个一个测试
先从R4来：
R1的外网接口Down 和up
在R1、R3和R4上出现的logging
R1上出现下列logging
R1(config)#int f0/0
R1(config-if)#sh
Apr 24 00:06:49.927: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
R1(config-if)#no sh
Apr 24 00:06:57.083: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Backup -> Master
R1#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 95 (cfgd 105) //优先级降到了95
Track object 100 state Down decrement 10
Master Router is 192.168.1.3, priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec (expires in 2.669 sec)
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.3, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.125 sec)
R3上出现：
#
Apr 24 00:06:29.779: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
Apr 24 00:06:49.635: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Backup -> Master
*Apr 24 00:06:56.935: %VRRP-6-STATECHANGE: Fa0/1 Grp 1 state Master -> Backup
R4上出现：
R4-pc4#ping 2.2.2.2 re 33333
Type escape sequence to abort.
Sending 33333, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!U.U.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.
Success rate is 96 percent (188/195), round-trip min/avg/max = 44/85/296 ms
//这里的切换更快，因为hello包为1s一个
在R5上测试，把R3的接口down后up，R5会出现下列所示
R5-pc5# ping 2.2.2.2 re 222222
Type escape sequence to abort.
Sending 222222, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!!!!!!!!!!!!!!!!!!!!!!!!U.U.....!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!.
Success rate is 95 percent (217/227), round-trip min/avg/max = 44/85/1128 ms
R5-pc5#
R3上show vrrp
R3#sh vrrp
FastEthernet0/1 - Group 1
State is Backup
Virtual IP address is 192.168.1.254
Virtual MAC address is 0000.5e00.0101
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 100
Master Router is 192.168.1.1, priority is 105
Master Advertisement interval is 1.000 sec
Master Down interval is 3.609 sec (expires in 3.353 sec)
FastEthernet0/1 - Group 2
State is Backup
Virtual IP address is 192.168.1.253
Virtual MAC address is 0000.5e00.0102
Advertisement interval is 1.000 sec
Preemption enabled
Priority is 95 (cfgd 105)
Track object 200 state Down decrement 10
Master Router is 192.168.1.1, priority is 100
Master Advertisement interval is 1.000 sec
Master Down interval is 3.589 sec (expires in 2.941 sec)
Cisco 交换机/路由器 ssh 配置
一准备工作：
1.开启交换机/路由器
2.连击Console控制线，到控制电脑
3.打开com口控制软件（支持ssh协议）
二配置工作：
1.进入特权模式
Cisco> enable2.输入密码
Password:3.进入全局配置模式
Cisco# conf t4.进入接口
（1）路由器输入
Cisco(config)#int GigabitEthernet 0/1 （2）交换机输入
Cisco(config)#int Vlan 15.根据需要配置IP
Cisco (config-if)#ip add x.x.x.x x.x.x.x6.打开接口
Cisco (config-if)#no shutdown7.可查看以上配置（可跳过，需要时查看）
Cisco (config-if)#do sh ip int br查看当前接口配置
8.退出接口
Cisco (config-if)#exi9.设置域名
Cisco (config)#ip domain-name cisco.com 为交换机/路由器配置一个域名，也可以认为该交换机/路由器属于这个域
10.配置SSH加密方式
Cisco (config)#crypto key generate rsa 生成一个为rsa算法的密钥
The name for the keys will be: R1.cisco.com
Choose the size of the key modulus in the range of 360 to 2048 for your
General Purpose Keys. Choosing a key modulus greater than 512 may take
a few minutes.
How many bits in the modulus [512]: 1024 ----------设置密钥为1024位
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]
*Mar 1 00:59:17.179: %SSH-5-ENABLED: SSH 1.99 has been enabled
PS：在Cisoc中rsa支持360-2048位密钥，该算法的原理是：主机将自己的公用密钥分发给相关的客户机，客户机在访问主机时则使用该主机的公开密钥来加密数据，主机则使用自己的私有的密钥来解密数据，从而实现主机密钥认证，确定客户机的可靠身份。
11.配置虚拟终端
Cisco (config)#line vty 0 512.使用本地数据库
Cisco (config-line)#login local 13.配置远程登录方式
Cisco (config-line)#transport input ssh 可先用Cisco (config-line)#transport input none ----------关闭VTY其他的远程登录协议
14.允许远程登录（非常重要）
Cisco (config-line)# access-class 1 in15.退出虚拟终端
Cisco (config-line)#exi16.创建用户名和密码
Cisco (config)#username admin password admin17.设置特权密码（可不设）
Cisco (config)#enable secret cisco 18.加入AAA认证
Cisco (config)# aaa new-model19.配置ssh超时时间
Cisco (config)#ip ssh time-out 12020.设置ssh版本
Cisco (config)#ip ssh version 2 配置完成
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