
To know the ping of a proxy server, time a real request through the proxy instead of sending ICMP packets to its IP address. The quickest way is one curl command with the proxy login and password and the write-out timers, which prints the TCP connect time to the proxy and the time to the first byte from the target site. Run it twenty times, write down the median and the worst result, and you have the two numbers that describe the ping for your task.
The question about proxy ping is asked by clients who need connection speed. Most often they are traders on stock exchanges, parsing specialists or users who need a stable connection to automate processes.
Ping requirements depend on the tasks: for some clients a delay of 100 ms is acceptable, for others even 20 ms is critical. The usual ping command helps neither group, because a rented private proxy answers only on its port and only after authorization, while ICMP replies come from the host itself. Below are the factors that make up those milliseconds, the values our proxies show in practice and four ways to measure the ping when the proxy requires a login and password.