using telnet to test ports

After years of not writing batch processing, the first case of the new company is to write a bat script, batch update collection agent configuration file, which involves remote IP port detection.This thought would be as simple as Linux to judge:

Hadoop-definitions of Computer Network PortsPort Introduction The ports described in this article are all logical ports, which refer to the ports in the TCP/IP protocol. The port number ranges from 0 to 65535, for example, port 80 used to browse Web

Lvs+keepalived was deployed yesterday and passed the test, no problems were found. This morning suddenly found, with ipvsadm–l view LVS information, response is very slow, and then go from the LVS telnet node port 22nd, found particularly slow.At

In network technology, port has two meanings: one is physical port, for example, ADSL modem, Hub, switch, router is used to connect other network equipment interface, such as RJ-45 port, SC port and so on. The second is the logical port, which

Telnet : TCP/IP a member of the agreement is Internet the standard protocol and primary method for remote login services. It provides users with the ability to perform remote host work on the local computer. To start a Telnet Session, you must enter

1 with 8080 ports for testing, first vi/etc/sysconfig/iptables open 080 ports Firewall 8080 Port:-A input-m State--state new-m tcp-p TCP--dport 8080-j ACCEPT 2 Reboot Firewall command: Service iptables restart View firewall Status: Iptables-l-N

Tag: Telnet detects whether the remote port is openMethod one. Common Telnet 118.10.6.128 88 way to test whether the remote host port is open.Method Two. Nmap ip-p Port test portsNmap IP shows all open portsDetermines whether the port is open

1. First introduce the daemon in Linux The Linux system has a special daemon inetd (Internet Services Daemon), which is used for Internet standard services and is typically started when the system starts. The inetd configuration file can be given

Hello, I'm Xiao Xu.See the title Maybe we all know, for the invasion of the most basic content, or to send up, to everyone careful study, know the role of each port, conducive to the implementation of intrusion and self-defense! Please bear in mind!1

The ping command cannot detect the port and can only detect if you and the corresponding IP are able to connect. an Ubuntu is installed in the local virtual machine, and the prompt fails when connecting to port 22 using putty, so check that the