check_tcp_stat.sh

Usage:
1.Add NRPE command to nrpe.cfg
echo 'command[check_tcp_stat]=/usr/local/nagios/libexec/check_tcp_stat.sh -w 300 -c 500 -l' >> /usr/local/nagios/etc/nrpe.cfg

DESCRIPTION
-H IP ADDRESS
-p LOCAL PORT
-S [TIME_WAIT|FIN_WAIT|ESTABLISHED|CLOSING|SYN_SEND|TIMED_WAIT|LISTEN]
-w warning
-c critical
-l logging turned on

For example:
Total connections:
check_tcp_stat.sh -w 100 -c 200
Port:
check_tcp_stat.sh -p 8819 -w 100 -c 200
Host and Port:
check_tcp_stat.sh -H 192.168.0.6 -p 8819 -w 100 -c 200

Note:
1.Such as opening the log function, to manually execute a command, the program will automatically create /var/log/tcp folder.

Log Preview:
2014-03-03 09:27:49 Total: 113 TIME_WAIT: 93 ESTABLISHE D: 20
2014-03-03 09:30:49 Total: 92 TIME_WAIT: 72 ESTABLISHE D: 20
2014-03-03 09:33:49 Total: 132 TIME_WAIT: 110 ESTABLISHE D: 22
2014-03-03 09:36:49 Total: 151 TIME_WAIT: 130 FIN_WAIT1: 1 ESTABLISHED: 20
2014-03-03 09:39:49 Total: 91 TIME_WAIT: 70 ESTABLISHE D: 21
2014-03-03 09:42:49 Total: 84 TIME_WAIT: 67 ESTABLISHE D: 17
2014-03-03 09:45:49 Total: 94 TIME_WAIT: 75 FIN_WAIT2: 1 ESTABLISHED: 18
2014-03-03 09:48:49 Total: 90 TIME_WAIT: 69 ESTABLISHE D: 21
2014-03-03 09:51:49 Total: 101 TIME_WAIT: 76 ESTABLISHE D: 25
2014-03-03 09:55:54 Total: 58 TIME_WAIT: 51 ESTABLISHE D: 7