Unable to get to camera from local wifi after installing comcast router

I had a cable modem (no wifi) running for a long time at my house. I also have a aus wifi router connected to it, with 4 foscam cameras using wifi. I have the camera ips and ports forwarded out on the asus router. I also have a dyndns hostname configured to point to the wan ip of my cable modem. So everything is working fine from internal and external.

This past weekend comcast installed their new wifi cable modem. So now dyndns is updated with the new wan ip.

After the install I coudn't get to the camera from my internal network, but no external. So on the comcast wifi modem I forward the ip of my aus wifi router and the port range os the cameras. (not sure if this was right to do). So now I can see my cameras from external, but not install now.

Any idea what I;m doing wrong?
rdefinoAsked:
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Joe Winograd, Fellow&MVEDeveloperCommented:
Here's my recommendation: Put the new Comcast modem/router in "Bridge Mode". This should be very easy to do on its main configuration page. Then plug your existing Asus router into LAN port 1 on the new Comcast device — it must go into port 1, because in Bridge Mode, only port 1 is active. Then everything will work as before — you'll be using the new Comcast modem/router as just a modem, while your Asus router will continue its router duties with no changes required. Regards, Joe
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rdefinoAuthor Commented:
Awesome, worked!!!
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Joe Winograd, Fellow&MVEDeveloperCommented:
That's great news!
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