GitHub - pbl64k/chktcpport: A simple tool for checking whether a remote TCP port is open.

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A simple tool for checking whether a remote TCP port is open.

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Name		Name	Last commit message	Last commit date
Latest commit History 4 Commits
LICENSE		LICENSE
Makefile		Makefile
README		README
chktcpport.c		chktcpport.c
test.sh		test.sh

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A tiny tool I threw together in a couple of minutes at a friend's
request. Reportedly works under HP-UX 11.

Usage:

    ./chktcpport <REMOTE_HOST> <REMOTE_PORT> <TIMEOUT_IN_SECS>

E.g.:

    ./chktcpport github.com 80 5 && echo 'Port open.'

test.sh is an example of using this for scripting. It will test all
the combinations of two hostnames, "github.com" and "localhost", and the
following ports - 21, 22, 25, 80, 81, 443, 7777 and 12345.