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VPN client of a service provider is blocked by the IPS Blade

Question asked by Alexander Petzold on May 24, 2018
Latest reply on May 29, 2018 by Alexander Petzold
Hello everybody,
we implemented a VPN client for a VPN connection to a service provider on a client in our network. It is the SonicWall VPN Client. The client establishes an IPSec connection to the service provider.
Now the following problem: If you want to establish a connection, the request from the IPS Blade of our Checkpoint rejected with the notice "IP Fragments". If you want to add an exception for this case, this will be rejected by the checkpoint. No exception for this protection possible.
Does anyone have any idea why this might be ?
Thanks Alex