packet tracer network

Clone Zabbix's own template ICMP ping templates 650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M01/86/F3/wKioL1fPrcLi2YxjAAByYarcCOM203.jpg-wh_500x0-wm_3 -wmp_4-s_2806794333.jpg "title=" ping 202.96.209.5.jpg "alt=" Wkiol1fprcli2yxjaabyyarccom203.jpg-wh_50 "/>Here I make a network delay template to 202.96.209.5 Shanghai DNS650) this.width=650; "Src=" Http://s3.51cto.com/wyfs02/M02/86/F3/wKioL1fPrnnS2DkyAACNTuKAcik725.jpg-wh_500x0-wm_3 -wm

Solution 1: Disable all switches in the LAN five minutes later. Power on again to check if the network is back to normal! (Cause: it may be that the switch has used up its memory for a long time without restarting, resulting in slow data exchange speed or congestion caused by network storms) (another possible cause is that one or more interface modules of a vswitch are damaged, or an internal

viewing UDP packet datasudo tcpdump UDP | grep 18060Tcpdump-i eth1 ' Port 18060 '#指定端口打印详情命令 (Eth1 on behalf of the network card number)Tcpdump-vv-x-x-s 1500-i eth1 ' Port 18060 '#指定端口抓包 and write filesTcpdump-i eth0 Port 18070-w dump.pcap#指定ip抓包 and write filesTcpdump-i eth0 host 10.30.17.21-w Dump.pcap#指定ip和端口抓包Tcpdump-i eth0 host 10.30.17.21 and Port 18070-w dump.pcapPackage parsingWireshark Analysis Pca

Using the original socket to implement a simple acquisition network packet and reverse parsing IP,MAC address # include #include #include #include #include #include #define BUFFER_MAX 2048int main (int argc, char **argv){int rawsock;Char Buffer[buffer_max];Char *ethhead;Char *iphead;Char *phead;Creating the original socketif ((Rawsock=socket (Pf_packet,sock_raw,htons (ETH_P_IP))) printf ("Error:create raw s

1. TCP/IP layered model Of course, here we will only discuss the important layer-4 01. Application Layer (Application Layer): the Application layer is a broad concept. It has some similar system-level TCP/IP applications and Application protocols, as well as many enterprise applications and Internet applications. The http protocol runs at the application layer. 02. Transport Layer (Tanspot): the transport layer includes UDP and TCP. UDP does not check packets, while TCP provides transmission gua

Found on the Internet a handy tool for Packetsender, packet transmitters. For the Writing network program, there is great convenience. Although the Netcat tools are very useful under Linux, this is also good.Originally in English, to translate a bit. This is based on QT development. There are some places where the translation is wrong, please correct me.This article by Mob Lym fabricated, welcome reprintblo

protocol implemented here for detecting host 172.40.50.123 80 ports and 172.40.50.148 we can use () to raise or priority to implement 80 ports listening on two hosts () cannot be recognized by the system command, we need to use \ backslash to fetch Eliminate its definitionNMAP-A-i eth0 TCP port and \ (host 172.40.50.123 or host 172.40.50.148\)Here is a simple script, using the location variable, where the shift to skip the previous definition, so our port port is not entered into the definition

, TCP communication, we know that TCP is reliable transmission-the sender of what I promise to send you intact, as for you to receive a look, oops, the bag stuck together how can I share clearly? Oops, this sent the data I parse out how is garbled? --It's not about TCP communications! This is your programmer to do the work of the message processing, the message transmission TCP to help you dry, and TCP is the name of the "Iron teeth sweet basil, honest and reliable little husband", has been ever