<p/>
In order to differentiate between the tunnels to <b>alice</b> and <b>venus</b>, respectively,
<b>XFRM marks</b> are defined for both the inbound and outbound IPsec SAs and policies using
-the <b>mark=</b> ipsec.conf parameter. <b>iptables -t mangle</b> rules are then used in the PREROUTING
-chain to mark the traffic to and from <b>alice</b> and <b>venus</b>, respectively.
+the <b>mark</b> parameter in ipsec.conf.
+<p/>
+<b>iptables -t mangle</b> rules are then used in the PREROUTING chain to mark the traffic to
+and from <b>alice</b> and <b>venus</b>, respectively.
<p/>
<b>leftfirewall=yes</b> automatically inserts iptables-based firewall rules that let pass
the tunneled traffic. In order to test the tunnel, the NAT-ed hosts <b>alice</b> and <b>venus</b>