ONE Kubernetes appliance and ip forwarding on a node - bug or feature

Hi!

I’ve installed a Kubernetes Appliance from the ONE Marketplace and found out that by default after installing any pod within one namespace can’t reach any pod in other namespace as well as Internet. Even coredns pod from kude-system can’t get DNS data from Internet.

I’ve found that by default node OS has

net.ipv4.ip_forward=0
net.ipv6.conf.all.forwarding=0

After sysctl values changes routing between interfaces starts to work.

Is it a bug or feature? Should I make a bug report somewhere?