Draytek Vigor - You have reached the maximum number of permitted internet sessions...


Users accessing Internet via Draytek Vigor 2820 router occasionally get following message in their browsers and can not longer access Internet:

You have reached the maximum number of permitted Internet session.
Please close one or more application to allow further Internet access.
Contact your system administrator for further information.
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Closing applications or restarting a device, doesn't resolve the issue.


Few days before users started complaining about this issue, I updated router's firmware It seems that the issue is a bug in Draytek Vigor firmware. The error went away after downgrading firmware to

Draytek Vigor 2820Vn


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