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ezhov-da/linux-Проверка доступности TCP.txt

Created October 30, 2020 07:24
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Проверка доступности TCP
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linux-Проверка доступности TCP.txt
==> https://www.cyberciti.biz/faq/ping-test-a-specific-port-of-machine-ip-address-using-linux-unix/
## check for tcp port ##
## need bash shell ##
(echo >/dev/tcp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/udp/{host}/{port}) &>/dev/null && echo "open" || echo "close"
(echo >/dev/tcp/www.cyberciti.biz/22) &>/dev/null && echo "Open 22" || echo "Close 22"
(echo >/dev/tcp/www.cyberciti.biz/443) &>/dev/null && echo "Open 443" || echo "Close 443"
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