Port Forwarding

Thanks for your fast responses.
First of all i checked all the next rules:
iptables -A tcp_packets -p TCP -s 0/0 --dport 139 -j ACCEPT
iptables -A udpincoming_packets -p UDP -s 0/0 --source-port 139 -j ACCEPT
iptables -t nat -A PREROUTING -p tcp -d 83.132.157.x --dport 139 -j DNAT --to 192.168.0.200:139 //filtered <-
iptables -t nat -I PREROUTING -p tcp -i eth0 --dport 139 -j DNAT --to 192.168.0.200:139 //filtered <-
iptables -t nat -A PREROUTING -p tcp -i eth0 -d 83.132.157.x --dport 139 -j DNAT --to 192.168.0.200:139 iptables -A FORWARD -p tcp -i eth0 -d 192.168.0.200 --dport 139 -j ACCEPT
//closed <- host down
iptables -t nat -A PREROUTING -p tcp -i eth0 --dport 139 -j DNAT --to 192.168.0.200:139 iptables -A FORWARD -p tcp -i eth0 -d 192.168.0.200 --dport 139 -j ACCEPT
//filtered <-
iptables -t nat -I PREROUTING -p tcp -i eth0 --dport 139 -j DNAT --to 192.168.0.200:139 iptables -A FORWARD -p tcp -i eth0 -d 83.132.157.x --dport 139 -j ACCEPT
//filtered <- host down
iptables -t nat -I PREROUTING -p tcp -i eth0 --dport 139 -j DNAT --to 192.168.0.200:139 iptables -A FORWARD -p tcp -i eth0 --dport 139 -j ACCEPT
//filtered
With my friend's help.
And none of them directed the output.
There is no problem to forward the port 139, because it will be
forwarded to a honeypot machine =) (running on virtualbox).
When started to test with the ipmasq the host stopped to listen on
other ports (ssh for lan for example),but connection sharing still
works.
And my friend couldnt connect to the host.