In this exercise, you need to modify a kernel module to provide more information.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Enable nf_conntrack time stamping in the running kernel.
Check to see if the module is loaded:
lsmod | grep nf_conntrackView the parameters available for the
nf_conntrackmodule:modinfo nf_conntrackVerify the current setting of the timestamp parameter:
cat /sys/module/nf_conntrack/parameters/tstampStop the firewall and unload the module:
systemctl stop firewalldmodprobe -r nf_conntrackLoad the module with timestamping enabled:
modprobe nf_conntrack tstamp=1Verify the current setting of the timestamp parameter:
cat /sys/module/nf_conntrack/parameters/tstamp- Make the change persist through a restart.
Make the change persist through a reboot:
echo "options nf_conntrack tstamp=1" > /etc/modprobe.d/nf_conntrack.conf
