75 lines
2.0 KiB
Bash
Executable File
75 lines
2.0 KiB
Bash
Executable File
#!/bin/sh
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#
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# Wildcard-plugin to monitor forward traffic for network interfaces through iptables. To monitor an
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# interface, link if_forward_<interface> to this file. E.g.
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#
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# ln -s /usr/share/node/node/plugins-auto/if_forward_ /etc/munin/node.d/if_forward_eth0
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#
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# ...will monitor forwarded traffic trough eth0.
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#
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# Additionally, you need these iptables rules as the first rules (they don't do anything, just make packet counts)
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#
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# iptables -A FORWARD -i eth0
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# iptables -A FORWARD -o eth0
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#
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# Furthermore, this plugin needs to be run as root for iptables to work
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#
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# This plugin is based on the if_ and ip_ plugin.
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#
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# Magic markers (optional - used by munin-config and some installation
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# scripts):
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#
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#%# family=auto
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#%# capabilities=autoconf suggest
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IF=`basename $0 | sed 's/^if_forward_//g'`
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if [ "$1" = "autoconf" ]; then
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if [ -r /proc/net/dev ]; then
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iptables-save -c >/dev/null 2>/dev/null
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if [ $? -gt 0 ]; then
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echo "no (could not run iptables-save as user `whoami`)"
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exit 1
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else
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echo yes
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exit 0
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fi
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else
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echo "no (/proc/net/dev not found)"
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exit 1
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fi
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fi
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if [ "$1" = "suggest" ]; then
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if [ -r /proc/net/dev ]; then
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egrep '^ *(eth|wlan|ath|ra)[0-9]+:' /proc/net/dev | cut -f1 -d: | sed 's/ //g'
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exit 0
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else
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exit 1
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fi
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fi
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if [ "$1" = "config" ]; then
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echo "graph_order out in"
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echo "graph_title $IF forwarded traffic"
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echo 'graph_args --base 1000'
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echo 'graph_vlabel bits per ${graph_period}'
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echo 'graph_category network'
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echo "graph_info This graph shows only FORWARD traffic that pass through the interface."
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echo 'out.label sent'
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echo 'out.type DERIVE'
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echo 'out.min 0'
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echo 'out.cdef out,8,*'
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echo 'in.label received'
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echo 'in.type DERIVE'
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echo 'in.min 0'
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echo 'in.cdef in,8,*'
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exit 0
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fi;
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iptables-save -c | grep $IF | grep i | cut -f2 -d':' | cut -f1 -d']' | awk "{ print \"in.value \" \$0 }"
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iptables-save -c | grep $IF | grep o | cut -f2 -d':' | cut -f1 -d']' | awk "{ print \"out.value \" \$0 }"
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