The Photon operating system must not perform IPv4 packet forwarding.

Routing protocol daemons are typically used on routers to exchange network topology information with other routers. If this software is used when not required, system network information may be unnecessarily transmitted across the network.

At the command line, run the following command:

# /sbin/sysctl -a --pattern "net.ipv4.ip_forward$"

Expected result:

net.ipv4.ip_forward = 0

If the output does not match the expected result, this is a finding.

At the command line, run the following commands:

# sed -i -e "/^net.ipv4.ip_forward/d" /etc/sysctl.conf
# echo net.ipv4.ip_forward=0>>/etc/sysctl.conf
# /sbin/sysctl --load