Openwrt中用iftop查看网络流量情况
iftop可以查看指定网卡上的流量情况, 命令说明
iftop: display bandwidth usage on an interface by host Synopsis: iftop -h | [-npblNBP] [-i interface] [-f filter code] [-F net/mask] [-G net6/mask6] -h display this message -n don't do hostname lookups -N don't convert port numbers to services -p run in promiscuous mode (show traffic between other hosts on the same network segment) -b don't display a bar graph of traffic -B display bandwidth in bytes -a display bandwidth in packets -i interface listen on named interface -f filter code use filter code to select packets to count (default: none, but only IP packets are counted) -F net/mask show traffic flows in/out of IPv4 network -G net6/mask6 show traffic flows in/out of IPv6 network -l display and count link-local IPv6 traffic (default: off) -P show ports as well as hosts -m limit sets the upper limit for the bandwidth scale -c config file specifies an alternative configuration file -t use text interface without ncurses Sorting orders: -o 2s Sort by first column (2s traffic average) -o 10s Sort by second column (10s traffic average) [default] -o 40s Sort by third column (40s traffic average) -o source Sort by source address -o destination Sort by destination address The following options are only available in combination with -t -s num print one single text output afer num seconds, then quit -L num number of lines to print iftop, version 1.0pre4 copyright (c) 2002 Paul Warren <pdw@ex-parrot.com> and contributors
如果要查看内网连接的各个IP的流量情况, 使用命令
iftop -i br-lan
显示的界面是类似于这样的
10b 1.00Kb 100Kb 10.0Mb 1.00Gb └───────┴─────────────────┴─────────────────┴─────────────────┴───────────────── 123.215.56.131 => x240.lan 2.96Mb 2.21Mb 2.25Mb <= 172Kb 127Kb 130Kb 125.103.109.3 => Honor_V8.lan 671Kb 899Kb 735Kb <= 14.5Kb 14.7Kb 12.9Kb 125.102.164.48 => 20180331KQT.lan 485Kb 840Kb 329Kb <= 17.6Kb 40.1Kb 18.4Kb 125.102.164.31 => 20180331KQT.lan 0b 184Kb 75.8Kb <= 0b 34.9Kb 12.8Kb 200.132.127.188 => 192.168.253.176 0b 116Kb 29.0Kb <= 0b 5.53Kb 1.38Kb 112.233.48.111 => 192.168.253.176 478Kb 95.6Kb 23.9Kb <= 23.6Kb 4.73Kb 1.18Kb 125.15.222.48 => EDZ-20180331KQT.lan 0b 77.1Kb 41.9Kb <= 0b 12.4Kb 6.69Kb ──────────────────────────────────────────────────────────────────────────────── TX: cum: 175MB peak: 4.69Mb rates: 4.66Mb 4.47Mb 4.21Mb RX: 8.49MB 498Kb 277Kb 293Kb 305Kb TOTAL: 183MB 5.16Mb 4.93Mb 4.75Mb 4.50Mb
界面的说明:
第一行是刻度, 因为下面显示的每一个连接, 都会根据流量大小高亮显示, 根据的是第一行的刻度. 刻度默认显示的是普通坐标, 按L(大写)可以在普通坐标和对数坐标之间切换
第二行之后是每一个有流量的连接, 箭头表示流向, 右侧的三个数, 分别表示最近的2s, 10s, 40s的平均流量
底部三行, 分别是TX出向, RX入向, TOTAL总计三个维度的统计, 每个维度里面显示的数值分别为cum合计, peak峰值, rates: 2s, 10s, 40s的流量均值
运行时可以使用的命令, 可以通过按h(小写)查看
查看系统日志, 可以用 logread 命令
