ipportfw - security

[Jens Pall Hafsteinsson <jph strengur is>]

Hi

Are there any known security holes or necessary precautions in using port 
forwarding with ipportfw?
I'm planning on forwarding ports from an outer firewall/router (connected 
to the Internet) to a host in the DMZ, then on from the DMZ host to the 
inner firewall, and finally from the inner firewall to some host on the 
inside.

Thanks,

Jens
jph strengur is