Ok, so I took a dive into this with my 2680. Though I do have the 3060 model router. I'm seeing the same thing. Just had 1 wired PC and wireless was disabled. Even tried with just 1 browser and tab open to the routers web page. Rebooted and these entries continue soon after the router is back to ready. I got with on online chat support and got a bit more steps to try. I disconnected the router from ISP services and rebooted the router. After giving 3-5 minutes, these log entries are NOT seen. Only 5 lines are seen. One the modem services was re-connected, the log entries began again. Support feels this is a router/FW side issue.
So they would like me and any other users experiencing this, to send
support@dlink.com an email with all your information, troubleshooting steps, FW version loaded and anything else you think would help them review this more. Include any other D-Link routers that you may have and tried to compare. Also ISP service and modem mfr and model would be helpful as well. Send this off in a email and let see if we can get D-link to take a look and make a correction regarding this.
Other than this, the router seems to work ok. If users are experiencing other problems that I don't see, please include that as well.