Software User Guide

To see its current settings

$ sysctl -a 2>/dev/null | grep vcp | sort

or

$ crn/script/show.sh

To enable or disable it

$ sudo sysctl -w net.crn.vcp_enable=1

$ sudo sysctl -w net.crn.vcp_enable=0

To use it for some TCP ports (increasingly ordered for easy check)

$ sudo sysctl -w net.crn.vcp_ports=80,443,501-599,5001

To use it for all TCP ports

$ sudo sysctl -w net.crn.vcp_ports=1-65535

To use it for all TCP ports except port 22

$ sudo sysctl -w net.crn.vcp_ports=#22,1-65535

To use it for all TCP ports except ports 22 and 100~109

$ sudo sysctl -w net.crn.vcp_ports=#22,#100-109,1-65535

To check license expiration (day:hh:mm:ss)

$ sysctl net.crn.vcp_expire

net.crn.vcp_expire = 29d:09h:38m:30s

To check currently running #vcp-flows

$ sysctl net.crn.vcp_nflows

net.crn.vcp_nflows = 123

To check statistics (day:hh:mm:ss, total #tcp- and #vcp-flows)

$ sysctl net.crn.vcp_stats

net.crn.vcp_stats = 20d:15h:31m:03s,t(0/24),v(0/8451377)

To check software version

$ sysctl net.crn.vcp_version

net.crn.vcp_version = v390-da02

Note: If your device does not have sysctl installed, use /proc

file system directory /proc/sys/net/crn/ to check and modify

the configuration. For example:

$ for f in /proc/sys/net/crn/*; do echo "$f = $(cat $f)"; done

# echo 1 > /proc/sys/net/crn/vcp_enable

# echo 1-65535 > /proc/sys/net/crn/vcp_ports

Note: On ubuntu/centos/redhat/debian/suse servers, you may put

your typical vcp settings in crn/script/default.sh, which will

run automatically during server start. A similar setup can be done

for embedded devices.

$ sudo vi /opt/crn/script/default.sh