对指定的端口列表分别进行监控
说明：
LSNPORTS参数指定要监听的端口列表，以空格作为分割；
INTERVAL参数指定监控的时间间隔；
LOGPATH参数指定监控日志存放路径，如果该路径不存在，则脚本会自动添加。

日志生成方式：按照端口，每个端口生成一个日志文件，各自存放。
每次状态列表生成后都有一个简单汇总，汇报此次监控所有的端口连接数。
日志文件格式：netstat[port]-yyyy-mm-dd.log
日志文件内容格式：
DATE:2008-06-23 12:29:01 >> *.8080 *.* 0 0 24576 0 LISTEN
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.30467 1 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.19.30.1272 17680 0 25840 0 FIN_WAIT_1
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.31.36.1338 256288 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.35565 65535 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.31873 65535 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 125.210.228.71.34502 11040 0 24840 0 TIME_WAIT
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.34210 16560 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.37854 16467 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.16.42.37997 65535 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.90.25.2298 65110 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> 218.108.243.67.8080 10.0.31.36.1339 256680 0 24840 0 ESTABLISHED
DATE:2008-06-23 12:29:01 >> Total connections[8080]: 12

脚本内容如下：
#!/bin/sh

LSNPORTS="8080 23234 23345 1521";
INTERVAL=30;
iter=0;
LOGPATH=$HOME/lyon/toplog/logs;

if [ -n $LOGPATH ]; then
mkdir -p $LOGPATH;
fi;

while [ 1 ]; do
for port in $LSNPORTS
do
  CCTLST=`netstat -an | grep ".$port" | awk 'BEGIN{OFS="|";}{print $1,$2,$3,$4,$5,$6,$7;}'`;
  LOGDATE=`date +%Y-%m-%d`;
  LOGFILE="${LOGPATH}/netstat[${port}]-${LOGDATE}.log";
  LOGTIME=`date '+DATE:%Y-%m-%d %H:%M:%S'`;

  for ns in $CCTLST
  do
   NETLST=`echo $ns | awk -F"|" 'BEGIN{OFS=" ";}{print $1,$2,$3,$4,$5,$6,$7;}'`;

   iter=`expr $iter + 1`;
   loginfo=`echo "$LOGTIME" ">>" "$NETLST"`;
   echo "$loginfo" >> $LOGFILE;
#echo "$loginfo";
  done;
  echo "$LOGTIME >> Total connections[$port]: " $iter >> $LOGFILE;
#echo "Total connections[$port]: " $iter;
  iter=0;
  sleep $INTERVAL;
    done;
done;

端口监控脚本