telnet port 23

1. Summary: ICMP and IP protocol belong to the same level (network layer), its message is sealed in the IP message transmission, and the port is the Transport Layer TCP/UDP protocol concept, so ping port is not successful Ping server was found to be inaccessible today, but it was possible to access the server, so banning ping and port access are two concepts.

(In the past years, based on Esframework to do a lot of C/s system, but also to help customers solve a lot of development and operation of the technical problems, the personal feel that these historical experience is very valuable, and then I will gradually share these experiences, I hope to encounter similar problems of people who have been inspired and help. ）The primary function of the Telnet command is to make a TCP connection to the destination

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 corresponding port is turned on. under Windows to detect whether a port on

One function of the terminal is to change the TELNET port. The interface after running is as follows: C: \ WINNT \ system32> tlntadmn.exe Microsoft (R) Windows 2000 (TM) (internal version 2195) TelnetServer Admin (Build 5.00.99201.1) Select one of the following options: 0) Exit the application. 1) list the current user 2) end a user's session... 3) display/change registry settings... 4) Start Service 5) sto

In Telnet server applications, our administrators often log on to SQL. Here we will introduce the port conflict during Telnet to SQL server 2000. Hope to help you. First, let's take a look at the basic path to log on to the remote SQL Server. Check whether the server IP can be pinged. Check whether the physical connection with the remote SQL server 2000 server ex

H3C is a common switch and router. In order to manage multiple routers and switches, We can remotely control telnet or batch manage them. Now let's take a look at the specific content of the H3C telnet and console port logon configuration. Level descriptionLevel nameCommand0VisitPing, tracert, telnet1MonitoringDisplay, debugging2ConfigurationExcept for all comman

Many settings contain multiple protocols. Just like the port on which Telnet is connected to the SNMTP server we will explain today. How can this problem be solved? Next we will explain in detail how to telnet to port 25 on the computer running the Simple Mail Transfer Protocol (SMTP) Service to solve SMTP communicatio

To test whether a port on the remote host is enabled, you do not need to use complicated work. In windows, a tool is provided, that is, Telnet. The ping command cannot detect the port. It can only detect whether you can connect to the corresponding IP address. 1. Install Telnet. There is no

Port setting is an important step in Telnet sessions. So today we will give a detailed introduction to this part. For example, if you encounter problems when sending emails through SMTP between two Microsoft Exchange 2000 Server servers, you can test the SMTP connection by using Telnet on the sending server to connect to port