Hello @rafayelÂ
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Is that server really checking on a local LAN IP address starting with 192.168.2 ?
Normally access is granted on the public IP address and that doesn't change after a restart of your laptop or even after restarting the KPN modem/router.
Are you maybe using a VPN service that receives a different IP address every time you restart your laptop?
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You can also assign a fixed ip on your laptop, preferably by setting this in the KPN router. But worst case *you will regret this one day if you forget* in the network settings on the laptop. Then choose the number that it was assigned to by the router.