wollyka wroteI used to have the same setup but i has to change it a little when i switched to VDSL because the new modem supplied by IDM doesn't have bridge mode. So now, I let the modem connect using pppoe and i put the router in automatic IP mode. Also i put the router in the DMZ zone in the modem settings.
Thanks for the reply, I have dd-wrt firmware installed on my router, so I set it to Automatic Configuration - DHCP, and it worked with the modem. I don't have a DMZ mode on the modem, I only have a "Assign the public IP address of a connection to a device" option. After adding the router to this option, a popup informs me "to release the current private IP address of the device and then renew the IP address to acquire a public IP address". The connection then drops and no longer works. Any idea on what is happening?