Documentation/networking/netfilter-sysctl.txt

   1 /proc/sys/net/netfilter/* Variables:
   2
   3 nf_log_all_netns - BOOLEAN
   4         0 - disabled (default)
   5         not 0 - enabled
   6
   7         By default, only init_net namespace can log packets into kernel log
   8         with LOG target; this aims to prevent containers from flooding host
   9         kernel log. If enabled, this target also works in other network
  10         namespaces. This variable is only accessible from init_net.