# On Hardware Node we generally need
 # packet forwarding enabled and proxy arp disabled

 net.ipv4.conf.default.forwarding=1
 net.ipv4.conf.default.proxy_arp=1
 net.ipv4.ip_forward=1
 net.ipv4.conf.all.forwarding=1

 # Enables source route verification
 net.ipv4.conf.all.rp_filter = 1

 # Enables the magic-sysrq key
 kernel.sysrq = 1

 # TCP Explict Congestion Notification
 #net.ipv4.tcp_ecn = 0

 # we do not want all our interfaces to send redirects
 net.ipv4.conf.default.send_redirects = 1
 net.ipv4.conf.all.send_redirects = 0