netstat -n|grep -F :80|egrep '(ESTAB|SYN)'|awk '{print $5}'|sed 's/:[0-9]*//'|sort -u|wc -l
#netstat -nap ( ִ Ʈ)
#netstat -l Ǵ netstat -nap | grep LISTEN (LISTEN Ǵ Ʈ)
#netstat -nap | grep ESTABLISHED | wc -l ( )
#netstat -nap | grep :80 | grep ESTABLISHED | wc -l ( )