Sorry - I haven't seen this in the boards. Can I configure our Comcast router to open a DMZ or do I need to order static IPs? I just need one system that I can get to from the outside world.
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Welcome BruceCampbell. DMZ can be opened on the router by accessing the Firewall Tab and then the DMZ tab. As you state that you need remote access to only one system, having a fixed static IP is the optimal choice as this will eliminate any potential conflict with rest of your network. Alternately you can create a port forwarding rule for the device as this will also remote access capability while maintaining your network integrity.
I have the problem with DMZ too.
It seems that the DMZ feature on Gateway SMCD3G doesn't work. Could you help me?
I did enable that.
I did input one LAN device.
But the device can't be accessed neither via internet, nor LAN with public IP.