I am experiencing a set up issue with the new modem a Comcast technician installed today (01/04/2016). I am attempting to set up the remote desktop feature in the router for port forwarding and have been unsuccessful.
I have accessed the router's advanced functions via the Comcast log in feature in the router to complete the port forwarding,
setting the ip address to the newly assigned IPv4 address, however I am still not able to access the host computer from the remote computer.
The remote desktop access was working properly prior to the modem change. No settings have been made or altered in the windows remote desktop setup features (Windows 7) since the new modem has been installed. Comcast has pinged the modem and indicates all connections are working properly.
I am open to any ideas, or would like to know if anyone has experienced the same issue.
Hello bob2 and welcome,
You must first determine what Remote Device Address was being used before you has the Comcast Gateway (CG). You must use a Comcast Gateway (CG) DHCP non-dynamic IP or a static IP for this device. If you have a DPC39XXB CG and do not have any static IP address, then log into the CG, go to gateway.connections.LAN or LAN Status and change the starting DHCP address from 10.1.10.2 to 10.1.10.10.; click save settings for this to stick This will make your dynamic ip address range from 10.1.10.10 to 10.1.10.252 and leave you with static local addresses between 10.1.10.2 through 10.1.10.9.
I recommend that you setup your remote device to use 10.1.10.5 in its network configuration and use gateway address as 10.1.10.1 and subnet mask at 255.255.255.0 if you need to force feed. Now go to Advance settings and make sure the Remote Access Device 10.1.10.5 port number ??????? is open / forwarded and then you should be able to consistently remote login.
Hope this helps you out.
Call comcast support back again and have the tech confirm that the bootfile which is being sent to your modem matches the model number of the modem. If the modem gets a bootfile that is incorrect it can put it into a state where it kind-of-works to where it appears you have setup the interface properly for forwarding but it isn't actually doing anything.
I assume you have turned off the firewalling on the Comcast modem, and your using a static LAN IP on the windows 7 box not DHCP, the port forward is to 3389 and there are no typos, etc?