iptables problem

[Thiago Ribeiro <offs@fatea.br>]

Hello,

I have any problems with DNAT iptables. I'm redirecting my external http
port to remote host. I have 8 networks, beginning with 192.168.1-8. 
My remote machine and destination is 192.168.5.2 and all networks
excluding 192.168.5.0/24 can navigate in this.
When I'm running tcpdump or some similar to see the actions wich network
5's someone is making on external IP, is done nothing. Follow the rule:

-A PREROUTING -d 200.210.101.37 -p tcp -m tcp --dport 80 -j DNAT --to
192.168.5.2:80

I'm using network 7's address and the redirecting is perfect. Only
network 5 can't to do this.
-- 
Thiago Ribeiro
Administrador de Sistemas FATEA, Lorena - SP
Tel: (12) 31532888 Ramal 241