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gfoss/netcat heartbeat

Last active May 30, 2016 06:27
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NetCat based heartbeat one-liner, great for pentesting to let you know if the service you are testing has crashed.
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netcat heartbeat
$ while `nc -nn -vv -z -w3 [ip-address] [port] > /dev/null`; do echo "OK"; sleep 1; done; echo "DOWN"; while (true); do echo "***DOWN***"; sleep 5; done
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