port replicator

firewall on and off (effective immediately, fail after reboot): $ sudo service iptables start #开启 $ sudo service iptables stop #关闭 firewall on and off (takes effect after reboot): $ sudo chkconfig iptables on$ sudo chkconfig iptables off To open the relevant port : Modify the/etc/sysconfig/iptables file to add the following: -A input-p tcp-m state--state new-m TCP--dport 22-j ACCEPT After modifying the iptables, restart the firewall to take effect:

To view a process that uses a portThe simplest commands are:-i :端口号 1 If you want to use Administrator privileges then it is:sudo lsof -i :端口号 1 So looking at a process using a port number 3000 can be used:lsof -i :3000 1 You can also use:sudo lsof -i :3000 1 The results of the terminal are as follows:HarveydeMac-mini:~ harvey$ sudo lsof -i :3000COMMAND PID USER FD TYPE DEVICE

Disable window port 445 and window port 445 First, let's check what ports are currently open to the system. How can we check them? Call the cmd command line program and enter the command "netstat-na. Next, we can find that the current system has opened ports 135, 445, and 5357, And the status is all in the Listening status "Listening". Then, after confirming that your system has opened

When building mantis, there will always be 80 ports occupied. See the other steps are: 1, cmd run Netstat-ano see what 80 ports are occupied, and then in the Task Manager to find the corresponding end process. Usually the system is occupied, right-click End process can not end, the end of the process tree, the direct blue screen ~So I thought of modifying the port, not with them Rob 80 port, so I set up 808

Wan Port Setup method, the social routers are road 1 and Road 2 respectively1-Way 2 LAN port address changed to 172.16.1.1, restart2 notebook changed to 172.16.1.X, then enter settings, on the inside WAN address is set to static address 192.168.1.x, restartLan Setup Method:1 access to the management interface of Road 2, turn off DHCP2 Modify the LAN port address

Problem Description:The program has been working normally, today the computer re-made the system, and then began to appear this problem: "The given port name does not start with com/com or resolves to a valid serial port." Serial debugging assistant is also not used. Serial cable is not a problem, it is not a hardware problem, the program is not a problem (normal operation on other computers).Exception info

Concise Port Scan script and concise Port Scan script Script Name: monitor_port.pl Purpose: scan for a specific port. Script: 123456789101112131415161718192021222324252627282930313233343536373839404142434445 #!/usr/bin/envperl($sec,$min,$hour,$mday,$mon,$year)=(localtime)[0..5];($sec,$min,$hour,$mday,$mon,$year)=(sprintf("%02d",$sec),sprintf("%02d",$m

Enable port in CentOS7 and enable port in CentOS7Enable Port:Firewall-cmd -- zone = public -- add-port = 80/tcp -- permanentCommand description:-- Zone # Scope-- Add-port = 80/tcp # add a port in the format of port/communication p

[Reprint] How to receive a complete data packet parsing in the serial port, serial port data packet The serial port is used as the transmission medium to introduce how to send and receive a complete data packet. The process involves packaging and unpacking. A good packet transmission mechanism is designed to ensure the stability and correctness of data transmissi

Tomcat multi-port multi-application and tomcat port applicationTomcat starts from D:/Tomcat5.0/conf/server at startup. xml to obtain some basic information about server startup. in xml, you will see this node, as shown below:The first node under the node defines the listening port. The above example is 8080. For the node itself, the value of its attribute name is