Nating to a Linux Box or Solaris Box

i having a Red Hat linux 7.2 box with 2 NIC. One with public IP and another with private IP. It is having iptables enabled and i am doing a nating from public NIC to internal servers.

So when i hit able to get pages on internal server http://internalbox:port1. This is working fine only with NT boxes. when tried to forward the hit to any internal linux or solaris box, it is not working. Any constraints are there on linux and solaris box.
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pablouruguayConnect With a Mentor Commented:
put this

echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -A FORWARD -j ACCEPT -i eth0 -o eth0 -d 0/0
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