Port Forwarding on Edgewater Router

I factory reset and am setting up an Edgewater 4500T4 router using a very basic setup: It gets a static IP from our modem, and lets one of our servers handle DNS, DHCP, etc.  Whenever I go to forward ports, I end up losing Internet connection for all clients.  The clients can still access the router, but not beyond it.  At the same time, using the Ping utility on the router, it itself has no problems pinging outside the network.  So obviously I am messing up the firewall, but I don't understand why ADDING a forwarding rule messes up the Internet access?

There is a section where I can submit custom "iptables" commands but I know nothing about this.  The dropdown for "Protocol" also has an "Any" option, but for the life of me I couldn't tell it "Let all traffic through between LAN and WAN."  

Example, if I add the port forwarding rule of TCP 3389 to our mail server (so we can get into it remotely), everyone loses Internet.  But if there are NO RULES AT ALL the Internet works fine.  But I'm assuming our mail isn't flowing (no SMTP rule).

Anyone know about this?  Thanks in advance. screenshot of Port Forward screen
hvconsultingAsked:
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hvconsultingAuthor Commented:
We discovered the solution to this. Port Forwarding rules are set under NAT options, not Firewall options. Using the NAT page, we were able to get the network running again.
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MaurizioSchmidtCommented:
this window is clearly not showing the menu for port forwarding, in this window you can set routes from or to another network.
or better it is like a mixture of both, because for portforwarding the mask doesnt matter, but for routing the ports doesnt matter....strange menu.
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MaurizioSchmidtCommented:
Like i said, at least you could assign the points to the answer.
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hvconsultingAuthor Commented:
I thought I had given you the credit for it already? The pending close request says 500 points have been allocated to you.
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hvconsultingAuthor Commented:
We figured out the answer on our own.
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