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I want to get the behavior of "nc -z host port ; echo $?" with socat, since my network admins have disabled netcat. The purpose is just to test that a TCP connection is open between two servers. How would I go about doing this?

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Hi if you want check connection between server with socat try below command and refer link ..

CWsocat [options] <address> <address>
CWsocat -V
CWsocat -h[h[h]] | -?[?[?]]
CWfilan
CWprocan

try this link for better understanding.. there are other method to check the connectivity..

  • It's just socat's man page. Doesn't answer the question. – user666412 Sep 13 '16 at 13:49
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Since nc -z host port just attempt to connect without sending any data, it should be equivalent to socat /dev/null tcp4:host:port.

I think this can achieve your expected bahaviour with socat:

socat /dev/null tcp4:host:port > /dev/null 2>&1 ; echo $?

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