Владимир

-A PREROUTING -p tcp -m tcp -d <host_ip>/32 --dport 2210 -j DNAT --to-destination 192.168.0.10:22
-A PREROUTING -p tcp -m tcp -d <host_ip>/32 --dport 2211 -j DNAT --to-destination 192.168.0.11:22

192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 lxcbr0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 lxcbr0

iptables -t nat -A PREROUTING -d x.x.x.x -p tcp -m tcp --dport 8900 -j DNAT --to-destination y.y.y.y:8900
iptables -t nat -A POSTROUTING  -d y.y.y.y -j SNAT --to-source x.x.x.x
iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -A FORWARD -p tcp -m tcp -d y.y.y.y --dport 8900 -j ACCEPT

sudo apt-get install tcpdump
sudo tcpdump -i ppp0 -vnn icmp