linux-stable/Documentation/networking/netfilter-sysctl.rst

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.. SPDX-License-Identifier: GPL-2.0
=========================
Netfilter Sysfs variables
=========================
/proc/sys/net/netfilter/* Variables:
====================================
nf_log_all_netns - BOOLEAN
- 0 - disabled (default)
- not 0 - enabled
By default, only init_net namespace can log packets into kernel log
with LOG target; this aims to prevent containers from flooding host
kernel log. If enabled, this target also works in other network
namespaces. This variable is only accessible from init_net.