Tag：The server
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Time：2020-9-21
System version [[email protected] ~]# cat /etc/redhat-release CentOS release 6.8 (Final) [[email protected] ~]# uname -r 2.6.32-642.6.1.el6.x86_64 Network card description Eth0 192.168.1.8 (external network card of server)eth1eth2Two server network cards (intranet) Turn off the firewall [[email protected] ~]# /etc/init.d/iptables stop [[email protected] ~]# chkconfig iptables off Shut down SELinux [[email protected] ~]#setenforce 0 [[email protected] ~]#sed -i ‘s/SELINUX=enforcing/SELINUX=disabled/‘ /etc/selinux/config Disable NetworkManager […]
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Time：2020-9-20
preface This is an architecture design based on small and medium enterprises or teams. Don’t consider big factories. There are good reasons to believe that large factories have absolute strength to build a rather complex environment. What is a small and medium-sized enterprise or team like? The development team is not fully […]
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Time：2020-9-20
After the MAC terminal is connected with the remote server, it may be disconnected because there is no data interaction with the server for a period of time. Now, the following methods can be used to maintain the long-term connection between the terminal and the remote server. Edit “SSH”_ Config “file: sudo vi /etc/ssh/ssh_config Under […]
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Time：2020-9-20
When the back-end server is down or restarted, the front-end Vue continuously reconnects the websocket Problem recurrence: when the back-end service is restarted, the front-end connected websocket is broken, and it is necessary to refresh the page to re-establish the connection. In addition, some business scenarios, such as the large screen of the hardware monitoring […]
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Time：2020-9-19
Why do we use token Token, a token, represents the right to perform certain operations, that is, our pass to perform certain operations. 1.1 a long time ago, what did we use for authentication? We all know that HTTP is a stateless protocol: http has no memory for transaction processing and does not save the […]
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Time：2020-9-19
Learn English every day and make a little progress every day preface In the process of interviewing, I think many of my friends will encounter the following questions:When you type in the URL, go to the web page to display what happened“In the interview. Not to mention, this is a very common question. The supervisor […]
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Time：2020-9-18
Learn English every day and make a little progress every day preface In the process of interviewing, I think many of my friends will encounter the following questions:When you type in the URL, go to the web page to display what happened“In the interview. Not to mention, this is a very common question. The supervisor […]
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Time：2020-9-18
Recently, I saw a Bypas CSP record, and then I learned it again Configure CSP Here, set the HTML header directly to achieve the effect of configuring CSP. Content-Security-Policy: script-src ‘self’ ‘unsafe-inline’ Create HTML and load JS. The code is as follows, It can be executed normally Change JS to external JS You can see […]
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Time：2020-9-18
Server code import com.chinadaas.bio.chinadaasbio.webSocket.handler.ServerHandler; import io.netty.bootstrap.ServerBootstrap; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelInitializer; import io.netty.channel.ChannelOption; import io.netty.channel.ChannelPipeline; import io.netty.channel.nio.NioEventLoopGroup; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioServerSocketChannel; import io.netty.handler.codec.http.HttpObjectAggregator; import io.netty.handler.codec.http.HttpServerCodec; import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler; import io.netty.handler.logging.LogLevel; import io.netty.handler.logging.LoggingHandler; import io.netty.handler.stream.ChunkedWriteHandler; public class Server { public static void main(String[] args) throws Exception { NioEventLoopGroup boosGroup = new NioEventLoopGroup(1); NioEventLoopGroup workerGroup = new NioEventLoopGroup(); try […]
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Time：2020-9-18
1. Three handshakes Setting concept: according to the packet header field of TCP, there are three important IDS ACK, syn and finACK: indicates the validation fieldSYN: the bit is set to 1, indicating the establishment of a TCP connectionFin: if the bit is set to 1, it means the TCP connection is disconnected Three handshake […]
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Time：2020-9-17
Tomcat, HTTP summary 1 Server overview What is a server? The server is divided into server hardware and server software. Only when the server software is installed on the hardware server can it provide external services. Server hardware: a computer with an independent IP address on the Internet Server software: it is a program on […]
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Time：2020-9-17
A few days ago, Tencent Yujian Threat Intelligence Center reported an invasion case of h2miner gangs using saltstack vulnerability to control server mining. It is reported that Tencent Security Threat Intelligence Center detected on May 3, 2020 that h2miner Trojan horse used saltstack remote command execution vulnerability (cve-2020-11651, cve-2020-11652) to invade enterprise hosts for mining. […]
