doc: document nat table for IPv6
Based on the IPv4 description.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/iptables/ip6tables.8.in b/iptables/ip6tables.8.in
index 58b7bfc..24c6f66 100644
--- a/iptables/ip6tables.8.in
+++ b/iptables/ip6tables.8.in
@@ -106,6 +106,13 @@
\fBFORWARD\fP (for packets being routed through the box), and
\fBOUTPUT\fP (for locally-generated packets).
.TP
+\fBnat\fP:
+This table is consulted when a packet that creates a new
+connection is encountered. It consists of three built-ins: \fBPREROUTING\fP
+(for altering packets as soon as they come in), \fBOUTPUT\fP
+(for altering locally-generated packets before routing), and \fBPOSTROUTING\fP
+(for altering packets as they are about to go out). Available since kernel 3.7.
+.TP
\fBmangle\fP:
This table is used for specialized packet alteration. Until kernel
2.4.17 it had two built-in chains: \fBPREROUTING\fP
