netconsole

用途

遠端 Linux 機器的 kernel 訊息可以透過網路傳出來

Applicaiton on GW

etc\/rc.d\/S55syslogd.sh

ramfs\/bin\/setnetconsole.sh

Check status by

$(dmesg)

$(lsmod | grep netconsole)

Testing

Client

echo h > /proc/sysrq-trigger

echo my kernel message > /dev/kmsg

nc client :

echo "Debug" | busybox nc $target_ip $target_port

Server

nc -l -p $target_port

Packet capture

tcpdump -i eth0 -n -e port 5577 -s 0 -w \/var\/www\/htdocs\/netconsole.pcap

Now we only test by getting packet successfully

args:

source_interface

• Default : eth10

• WAN1 : eth0

Source IP 

Source Port 

Target IP 

Target Port 

Target MAC