From mboxrd@z Thu Jan  1 00:00:00 1970
From: Akshat Kakkar <akshat.1984@gmail.com>
Subject: are restore-mark and -m connmark same ?
Date: Thu, 3 Sep 2015 14:05:37 +0530
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ARE

iptables -t mangle -A PREROUTING -j CONNMARK --restore-mark
iptables -t mangle -A PREROUTING -m mark ! --mark -0x0 -j ACCEPT

and

iptables -t mangle -A PREROUTING -m connmark --ctstate RELATED,
ESTABLISHED -j ACCEPT


_exactly_ same or there can be any case/condition where this will fail ?