I’ve been having some issues with a Draytek 2820 at home lately. I’d made some changes to my network and swapped out a none WiFi Draytek 2820 with the WiFi version. Whilst configuring the new router I took the opportunity to upgrade the Firmware to the latest version (22.214.171.124 , Release Jan 2016).
A few days later I started getting an error message browsing the internet:
“You have reached the maximum number of permitted Internet sessions. Please close one or more applications to allow further Internet access. Contact your system administrator for further information.”
I rebooted the router, which solved the problem, and didn’t think much of it. This happened again a few days later, so I checked the Session Limit, under Bandwidth management, and this was disabled. I did note that the message I saw in the browser was the same message that would be displayed if the Session Limit was enabled.
I tried enabling session manager and then disabling, just in case the GUI was not reporting it correctly, but still the same problem.