Add support for TCPing as a monitor (for when hosting Docker images in services that block ICMP or networks that firewall ICMP packets from the general public)

[kristiandg]

📑 I have found these related issues/pull requests

Doing a search in the forum for TCPING, I found no hits.

🏷️ Feature Request Type

New monitor, Change to existing monitor

🔖 Feature description

The ability for the PING module to additionally utilize TCPING (if selected/desired) than the native ICMP ping (maybe in the form of a checkbox within the existing PING monitor config).

✔️ Solution

By providing a checkbox within the PING monitor that allows utilizing TCPING instead of the native PING, this will allow docker images hosted in services like Azure, to have a ping function (as Azure, and presumably others, block ICMP packets out of Containers). This will also be helpful for deployments where the network infrastructure blocks ICMP traffic from clients.

❓ Alternatives

I am only aware of the utility TCPING, though there may be others. The goal is to just allow an alternative method to an ICMP Ping, for when ICMP is unusable in the server's environment.

📝 Additional Context

No response