To avoid Ping Flood attacks, Windows Azure does not allow external ICMP communication, so we cannot ping it using the ping command. However, within the same Virtual Network in Microsoft's data center, the operating system firewall allows ICMP, so VMs can ping each other.

But what if we want to test the stability and response time of Azure servers? In that case, it is recommended to use a tool similar to ICMP Ping but based on TCP protocol, such as tcping.

Download tcping.exe and place it in the C:\Windows\System32 directory. Then, open the command prompt by pressing WIN+R and typing cmd. Now, we can use the tcping command to ping. There are many explanations of the command available online, but here is a simple example: tcping -t www.zouxiuping.com (continuous ping).

tcping is not limited to Windows Azure ping service; it can also be used for any server that blocks ping, such as Heng Chuan Technology.

Download link: [tcping.zip](http://pan.baidu.com/s/14JtmQ)