用bandwidthd监控你的网络

在UNIX下有很多优秀的流量监控软件,今天我们在这里要说的是用bandwidthd监控你的网络,把bandwidthd安装在网关上可以监控到你整个网络中每个IP的流量,而且可以用曲线图显示各个协议,例如包含http,tcp,udp,icmp,vpn以及p2p协议的流量,以IP为单位.默认的颜色,TCP为绿色;HTTP为蓝色;FTP为浅蓝;P2P为粉红;UDP为棕褐色; ICMP为红色。
1,安装:
更新ports后，
cd /usr/ports/net-mgmt/bandwidthd/
make  install 

Make clean

装好了。

2,配制

在你的web下建立一个叫bandwidth的目录，

进入到web目录/bandwidth/

#Ln –s /usr/local/bandwidth/htdocs  info

用ll命令察看下

应该会看到bandwidthd -> /usr/local/bandwidthd/htdocs

然后进入到

Cd  /usr/local/bandwidthd/etc/

Mv bandwidthd.conf-dist  bandwidthd.conf

修改配置信息：
ee /usr/local/bandwidthd/etc/bandwidthd.conf

一般修改一下网段和掩码,其他的用默认值即可,如果你熟悉英文,就看看其他选项.大概如下 
编辑： 
/usr/local/bandwidthd/etc/bandwidthd.conf 
####################################################

# Bandwidthd.conf

# Commented out options are here to provide

# documentation and represent defaults

# Subnets to collect statistics on.  Traffic that

# matches none of these subnets will be ignored.

# Syntax is either IP Subnet Mask or CIDR

#subnet 10.0.0.0 255.0.0.0

subnet 192.168.0.0 255.255.255.0

#subnet 172.16.0.0/12

# Device to listen on

# Bandwidthd listens on the first device it detects

# by default.  Run "bandwidthd -l" for a list of

# devices.

dev "xl0"   #  把xl0改为相应的内网卡

###################################################

# Options that don't usually get changed

# An interval is 2.5 minutes, this is how many

# intervals to skip before doing a graphing run

skip_intervals 1  # 刷新的时间

# Graph cutoff is how many k must be transfered by an

# ip before we bother to graph it

graph_cutoff 1024   #1024K以上才有图形

#Put interface in promiscuous mode to score to traffic

#that may not be routing through the host machine.

#promiscuous true  #让网卡在混杂模式中记录

#Log data to cdf file htdocs/log.cdf

output_cdf true   #在bandwidthd中生成log2.cdf log.cdf格式数据记录

#Read back the cdf file on startup

recover_cdf true   #在启动bandwidth时重新读取cdf的数据

#Libpcap format filter string used to control what bandwidthd see's

#Please always include "ip" in the string to avoid strange problems

filter "ip"   #以IP为过滤对象

#Draw Graphs - This default to true to graph the traffic bandwidthd is recording

#Usually set this to false if you only want cdf output or

#you are using the database output option.  Bandwidthd will use very little

#ram and cpu if this is set to false.

graph true

#Set META REFRESH seconds (default 150, use 0 to disable).

#meta_refresh 150

运行: 
mv /usr/local/etc/rc.d/bandwidthd.sh.sample /usr/local/etc/rc.d/bandwidthd.sh
启动

/usr/local/etc/rc.d/bandwidthd.sh start
以后server启动后，会自动启动 bandwidthd进程。