Intermittent disconnection of internet every week at the same time.
Network setup: Running Comcast modem in bridge mode with static ip. Have a Cisco firewall setup after the modem. Wireless disabled. Comcast modem/router model: TM608G.
I'm getting an issue that I've been experiencing for the past 5 months. Every 7 days, there is a 5-15 minute time period where the internet is down. The internal network is still working, but no one can access the internet and anyone with a VPN connection to our internal network gets disconnected. The Online light which is always solid green every other time, is blinking during this time period.
Also to note, whenever there is a power outage here (happens at least once a month), the weekly outage resets to be exactly 7 days after the power outage.
I've checked our internal network, but I don't think there is anything that is causing the internet to drop. I tried connecting a computer directly to the modem, bypassing our firewall and still no internet access. I've called into Comcast multiple times, and had multiple technician visits, and no one seems to know what might be the problem.
Anyone have any ideas what might be going on?