Netty framework learning -- preset ChannelHandler and codec

Netty provides many preset codecs and processors for many, which can be used almost out of the box, reducing the time and energy spent on cumbersome affairs Idle connections and timeouts Detecting idle connections and timeout is very important for releasing resources. Netty specifically provides several ChannelHandler implementations ...

Posted by brain on Sat, 22 Jan 2022 20:53:50 +0100

Basic configuration of VRRP

catalogue Case background and requirements Case configuration process Configuration interface Configure static routing Add VRRP configuration on router interface Check VRRP status Check VRRP connectivity and access path Configure VRRP tracking uplink port summary Case background and requirements In an enterprise network topology ...

Posted by cafrow on Sat, 22 Jan 2022 07:22:31 +0100

HCIP course notes-13-BGP routing principles

HCIP course notes-13 IBGP horizontal segmentation That is, when the router learns a route information from an IBGP peer, it will no longer announce the route to other IBGP peers. Route Reflector Router Reflector — RR We can configure an IBGP device as a routing reflector (RR), and the device configured as a routing reflector will reflect t ...

Posted by jtbaker on Sat, 22 Jan 2022 03:43:33 +0100

Operating system leb5 experiment report

Experiment Name: Experiment 5: proc file system programming Experimental purpose 1. Familiar with Linux commands2. Familiar with system API and programming Experimental content In leb4, although we can obtain the family information of process number pid through the module with parameters, it is not convenient for us to obtain the family inf ...

Posted by qazwsx on Sat, 22 Jan 2022 01:44:27 +0100

Filtering analysis of CAN communication receiving filter of STM32

1, Foreword After learning CAN communication, the bottom Dongdong CAN controller has finished processing for you, that is, the CAN communication protocol has been completed. You CAN throw data to the corresponding bit according to the protocol format. Therefore, when using CAN communication, we only need to care about formulating the protocol ...

Posted by millercj on Fri, 21 Jan 2022 23:50:48 +0100

OMNeT + + instance tictoc1-18

1. Download and install Enter the official website download interface, and the link is as follows: OMNeT + + official website , select the appropriate operating system and version to download. (take windows as an example). After downloading, unzip it to the specified folder and double-click the file mingwenv CMD, which can be completed ac ...

Posted by Griff1324 on Fri, 21 Jan 2022 18:13:43 +0100

The website nginx configuration limits the access frequency of a single IP to prevent DDOS malicious attacks

1, Introduction For websites, especially famous websites with large traffic, they often encounter attacks, such as DDOS attacks. Although some third parties, such as Cloudflare, can block them, for dynamic websites, PHP can only block some. At this time, it is necessary to limit the flow of a single IP malicious attack. Two modules of nginx ca ...

Posted by fredted40x on Fri, 21 Jan 2022 00:55:11 +0100

Republish experiment

catalogue preface​ Experimental requirements experimental analysis preface How to complete the experiment according to the experimental requirements? Experimental requirements 1. Multipoint two-way republication between the two protocols 2. The loopback of R7 is not announced in the OSPF protocol, and is republished later 3. ...

Posted by angeljyt on Thu, 20 Jan 2022 22:20:11 +0100

Qt network programming based on C + + -- network conference program based on IP Multicast

catalogue 1, Experimental topic 2, Experimental purpose 3, Overall design 1. Experimental principle 2. Design steps 4, Detailed design 1. Procedure flow chart 5, Experimental results and analysis 6, Summary and experience 1, Experimental topic Network conference program based on IP Multicast 2, Experimental purpose Referring t ...

Posted by AndrewBacca on Thu, 20 Jan 2022 20:38:55 +0100

Host GW model analysis of flannel in Kubernetes network

1. Flannel's host GW mode Flannel's host GW mode is a pure three-layer network interworking scheme, and the mutual access between pods is realized by routing. In the host GW mode, the cross node network communication needs to be realized through the routing table on the node, so the host hosts of both sides of the communication must be able to ...

Posted by mchip on Thu, 20 Jan 2022 10:36:51 +0100