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# comments are prefixed with # provider ISP-1 interface eth0 pinghost 10.2.0.3 up-action /etc/pingu/isp1 up down-action /etc/pingu/isp1 down provider ISP-2 interface eth1 pinghost 192.168.0.1 up-action echo "isp 2 went up" >> /var/log/isp2.log down-action echo "iso 2 went down" >> /var/log/isp2.log