netfilter: fix nf_conntrack_helper documentation

Since kernel 4.7 this defaults to off.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/Documentation/networking/nf_conntrack-sysctl.txt b/Documentation/networking/nf_conntrack-sysctl.txt
index 399e4e866a9c..433b6724797a 100644
--- a/Documentation/networking/nf_conntrack-sysctl.txt
+++ b/Documentation/networking/nf_conntrack-sysctl.txt
@@ -62,10 +62,13 @@ nf_conntrack_generic_timeout - INTEGER (seconds)
         protocols.
 
 nf_conntrack_helper - BOOLEAN
-        0 - disabled
-        not 0 - enabled (default)
+        0 - disabled (default)
+        not 0 - enabled
 
         Enable automatic conntrack helper assignment.
+        If disabled it is required to set up iptables rules to assign
+        helpers to connections.  See the CT target description in the
+        iptables-extensions(8) man page for further information.
 
 nf_conntrack_icmp_timeout - INTEGER (seconds)
         default 30