check_tcp behavior

[nagios at acmecargo.com]

I'm using the check_tcp plugin to check various ports that are open on many 
of our boxes opened by homegrown applications. The developers are concerned 
that the plugin might produce an output on the remote machine that would 
cause issues with the application. My question to the list is; does the 
check_tcp plugin simply look to see if the port is open, then closes the 
connection? or is there any output sent to the remote host? If I was a 
programmer/coder I imagine I could find my answer in the source for the 
plugin but since I am not, I am at the mercy of more intelligent 
individuals. Thanks!

Dylan



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