IPv6 initialized with default. That's ok. IPv4 makes a copy from init_net. Looks like a bug, here v2.6.24-2577-g752d14dc6aa9
root@zurg:~# sysctl net.ipv4.conf.all.forwarding=0 net.ipv6.conf.all.forwarding=0 net.ipv4.conf.all.forwarding = 0 net.ipv6.conf.all.forwarding = 0 root@zurg:~# unshare -n sysctl net.ipv4.conf.all.forwarding net.ipv6.conf.all.forwarding net.ipv4.conf.all.forwarding = 0 net.ipv6.conf.all.forwarding = 0 root@zurg:~# sysctl net.ipv4.conf.all.forwarding=1 net.ipv6.conf.all.forwarding=1 net.ipv4.conf.all.forwarding = 1 net.ipv6.conf.all.forwarding = 1 root@zurg:~# unshare -n sysctl net.ipv4.conf.all.forwarding net.ipv6.conf.all.forwarding net.ipv4.conf.all.forwarding = 1 net.ipv6.conf.all.forwarding = 0 This is nasty. Could we fix this or this bug set in stone?
