TCPing: A very useful network tool for Windows systems. It can obtain TCP delays, port connectivity, and delays of banned Ping servers.

I believe many friends know the automatic Ping command of the system, but if the IP is prohibited from PING, many users may not know how to test the delay. Then you can use TCPing to detect the delay. Of course, the premise is that you Know which port is open because TCPing must know an open port to function properly. Usually when we ping the server's IP, it is just the delay obtained by the ICMP protocol transmission, and some IDCs will optimize the ICMP delay very well. In fact, it is exposed once TCPing is used. Moreover, we mainly use the TCP protocol to transmit data, so we can test the delay obtained by TCPing. In addition, due to the handshake steps of the TCP protocol, it will be a little higher than the delay obtained by ICMP. If it is much higher, then the ICMP protocol may be specially optimized.

In addition to the situation mentioned above, we can also use TCPing to detect whether a certain port of the target IP is open (or smooth, if the server firewall is open and you cannot access it in the test, then it means the port is blocked). Of course, this Function The telnet client component that comes with Windows can also be implemented, but today we will only talk about TCPing.

TCPing download and installation tutorial

First we go to the official website of the TCPing software: https://elifulkerson.com/projects/tcping.php

We can see the latest version of TCPing file download address:

For Windows 32-bit systems, please click the tcping.exe link in the official website to download.

For Windows 64-bit systems, you can also click the tcping.exe link in the official website to download. If you must use 64-bit files, please click to enter the x64 folder, and then click the tcping64.exe link in the official website to download (after downloading Renamed to tcping.exe).

Install

If you only use this program temporarily, you can use it without installing TCPing, but you need to change tcping xxx in the following usage method to D:\abc\tcping.exe xxx.

After the download is completed, we need to copy (or move, cut) the downloaded tcping.exe file to the C:\Windows\System32 folder, which is ultimately the C:\Windows\System32\tcping.exe file .

After moving the file, we need to open the CMD program (must be opened newly), enter the following and press Enter:

tcping –v

If the prompt command does not exist, then the above operation is incorrect. If a large string of English text (TCPing version information) is prompted, the installation is normal.

How to use

When you use the tcping --help command above, the English help file displayed is the TCPing help file.

A brief introduction to commonly used commands:

tcping [command parameters] server address (IP/domain name) [server port] -t: Continuously TCPing until stopped using Ctrl+C keys Example: tcping -t 1.1.1.1 80 -n 5: Stop after TCPing 5 times Example: tcping -n 5 1.1.1.1 80 -i 5: TCPing every 5 seconds Example: tcping -i 5 1.1.1.1 80 -w 0.5: Set the timeout to 0.5 seconds (1 second = 1000 milliseconds), in seconds Example: tcping -w 0.5 1.1.1.1 80 -d: Add time information to each line of return information Example: tcping -d 1.1.1.1 80 -s: Automatically stop TCPing when the TCPing test is successful (TCPing delay data is returned within the timeout period) Example: tcping -s 1.1.1.1 80 -4: Prioritize IPv4 (if a domain name has IPv4 and IPv6 resolution, then use IPv4) Example: tcping -4 www.google.com 80 -6: Prioritize IPv6 (if a domain name has IPv4 and IPv6 resolution, then use IPv6) Example: tcping -6 www.google.com 80 --file: TCPing will loop through the server IP/domain name information in the file line by line (one per line, supports ports, for example: 1.1.1.1 443) Example: tcping --file D:\abc\1.txt -v: display version number Example: tcping -v # If you do not write the port of the server address, the default is port 80 # In fact, there are many command parameters, but most of them are not used, so they are omitted.

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