ifconfig enp0s0f6 up

ifconfig enp0s0f6 192.169.1.2

ifconfig eth1 netmask 255.255.255.0

DNAT --to-destination 10.137.77.2:33000
iptables -I FORWARD -s 10.137.4.22 -d 192.169.1.1 -j ACCEPT
iptables -I FORWARD -d 10.137.4.22 -s 192.169.1.1 -j ACCEPT
iptables -I INPUT -s 192.169.1.1 -d 192.169.1.2 -j ACCEPT

(Windows 7)-(Linux host 1)-(linux-host-2)
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         [crossover link on a dedicated NIC of Linux host 2]
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                        (windows XP host)