My Ping monitor always shows DOWN
If your Ping monitor always shows DOWN even though the server appears to be running, the most likely cause is that the server or its firewall is blocking ICMP (ping) traffic.
Why servers block ping
Many servers — particularly cloud servers and Windows servers — are configured to block ICMP echo requests by default as a security measure. This is normal and does not mean the server is offline. It simply means the server does not respond to pings.
How to verify this is the cause
Try pinging the server from your own computer. Open a terminal or Command Prompt and run ping yourserver.com. If you also get no reply, ICMP is blocked. If you get a reply from your computer but not from Alive24x7, the server may be blocking pings from specific IP ranges.
What to do
If the server is running a web service, use an HTTP or HTTPS monitor instead — this is a more reliable way to check that the server is up and serving requests. If you specifically need to monitor network reachability and the server supports it, configure the server's firewall to allow ICMP from the Alive24x7 monitoring IP addresses (contact support for the list).