Hello All, I am trying to set ip_forward value on a planetlab node using the command: > sudo sysctl -w net.ipv4.ip_forward=1 But, I got this error; error: permission denied on key 'net.ipv4.ip_forward' Can I set ip_forward value or not ? and why? I need to use planetlab node as a router to forward data to next hops. Regards, Alam Bakr