[Nagiosplug-help] TCP Half-Open Check

[Prigge Scott]

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Hi. I've got a requirement to check the status of a TCP connection on a specific port from a Nagios plugin. However the catch is that the plugin must not createa  full three-way handshake. Instead, I want the plugin to send a SYN packet, and generate a status from the SYN-ACK response that can then be checked by Nagios. When it receives the SYN-ACK packet, the plugin needs to send a RST packet.

The plugin can not open a full TCP connection. I've verified that the Check_TCP plugin will not work, as it opens a full TCP connection. Are there any other ways to accomplish this with a Nagios plugin?

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