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Is it possible, using Linux/Unix commands to check if a UDP port is open on a remote computer, the same way telnet works for TCP?

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The question is answered in great detail here: serverfault.com/questions/416205/testing-udp-port-connectivity – Gerald Schneider Aug 20 '15 at 9:45
up vote 2 down vote accepted

Use nmap to scan a remote computer.

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