Not only a VPN Connection Issue! After I installed the TC8305C, all my printers and other devices on my LAN stopped working. I could Ping them OK and see them, but I could not reach them. After a week or more of playing with the near infinite setups and troubleshooting advice from Comcast ... I finally gave up and swapped out the TC8305C for a Motorola SB6121 and ran that through my old Linksys router/switch. I got the "customer owned" SB6121 activated and everything went back to normal after that; but, I did have to reset my printers and port settings and reinstall some drivers. What a mess! I returned the TC8305C, and I wish I could get my time, frustration, and lost work compensated for!
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