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speedtouch 530 multinat

I have 2 public IPs. I want 84.xx.xx.78 to be point directly to and I want the rest of the PCs to share 84.xx.xx.77. I have setup multinat on my router to do this. However, when i try and contact 84.xx.xx.78 from the outside it only gets as far as my router. If i went to www.whatismyip.com from it will show 84.xx.xx.78. I assume I just need to set up some sort of route to map anything for 84.xx.xx.78 to but I cannot seem to get it to work correctly.  Can anybody help?
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1 Solution
Most routers these days have a dmz option, this will forward all incoming traffic to a specified ip address. Look for something like this.
Be careful with this option, not very secure. You can normally use port forwarding to forward specific tcp or udp ports. So if you just want to host a web server on the inside machine you'd just forward tcp port 80.

See this for more details:

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