Perintah netstat adalah perintah yang dipakai di lingkungan Unix dan Linux untuk melihat kesibukan jaringan yang keluar masuk server pada masing-masing interface jaringannya.
Sesuai dengan namanya netstat atau network statistic, maka keluaran dari netstat adalah statistik dari jaringan yang sedang terjadi baik masuk maupun keluar server.
Variasi pemakaian perintah netstat dapat dibaca di http://en.wikipedia.org/wiki/Netstat .
Sebagai contoh
#netstat -nt | less Active Internet connections (w/o servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 202.158.xx.xxx:80 114.79.29.26:34106 SYN_RECV tcp 0 0 202.158.xx.xxx:80 114.79.37.65:35930 SYN_RECV tcp 0 0 202.158.xx.xxx:26 118.96.92.136:50649 SYN_RECV tcp 0 0 202.158.xx.xxx:995 182.253.35.145:58962 TIME_WAIT tcp 0 0 127.0.0.1:34099 127.0.0.1:143 TIME_WAIT tcp 0 0 202.158.xx.xxx:993 118.96.92.136:16294 ESTABLISHED tcp 0 0 202.158.xx.xxx:110 114.79.16.42:38777 TIME_WAIT tcp 0 0 202.158.xx.xxx:993 112.215.64.166:59913 ESTABLISHED tcp 0 0 202.158.xx.xxx:80 180.250.27.237:63548 TIME_WAIT tcp 0 0 127.0.0.1:143 127.0.0.1:34097 TIME_WAIT tcp 0 0 202.158.xx.xxx:465 182.253.35.145:58983 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 36.69.123.95:24635 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 36.69.123.95:24634 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 118.96.56.6:1280 TIME_WAIT tcp 0 0 202.158.xx.xxx:80 125.160.211.121:17236 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 118.96.56.6:1282 TIME_WAIT tcp 0 0 202.158.xx.xxx:80 125.160.211.121:17239 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 36.69.123.95:24627 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 182.253.72.244:4618 TIME_WAIT tcp 0 90 202.158.xx.xxx:993 112.215.64.204:51234 ESTABLISHED tcp 0 2828 202.158.xx.xxx:110 182.253.35.145:56371 ESTABLISHED tcp 0 0 202.158.xx.xxx:80 112.215.66.78:53427 TIME_WAIT tcp 0 0 202.158.xx.xxx:80 114.79.37.17:39654 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 182.253.72.244:4595 TIME_WAIT tcp 0 0 10.168.194.1:40227 192.168.21.8:11000 ESTABLISHED tcp 0 81793 202.158.xx.xxx:80 182.253.72.244:58519 FIN_WAIT1 tcp 0 0 202.158.xx.xxx:80 180.250.27.237:36570 TIME_WAIT tcp 0 0 202.158.xx.xxx:80 139.192.90.50:57966 ESTABLISHED tcp 0 0 202.158.xx.xxx:80 139.192.90.50:57965 ESTABLISHED tcp 0 0 202.158.xx.xxx:110 175.106.9.21:2445 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 175.106.9.21:2447 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 175.106.9.21:2441 TIME_WAIT tcp 0 0 202.158.xx.xxx:110 175.106.9.21:2443 TIME_WAIT tcp 0 0 202.158.xx.xxx:55787 202.158.114.122:3260 ESTABLISHED tcp 0 90 202.158.xx.xxx:993 112.215.64.248:40607 ESTABLISHED tcp 0 0 202.158.xx.xxx:110 175.106.9.21:2439 TIME_WAIT tcp 0 0 202.158.xx.xxx:2095 180.242.211.105:10146 ESTABLISHED tcp 0 0 202.158.xx.xxx:110 182.253.35.145:4777 TIME_WAIT tcp 0 123200 202.158.xx.xxx:80 36.77.249.240:27231 ESTABLISHED tcp 1 48 202.158.xx.xxx:587 180.242.253.242:20195 CLOSING tcp 0 0 202.158.xx.xxx:80 202.53.249.120:51362 TIME_WAIT
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Perintah netstat