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SSL VPN - changing cryptographic settings - will user cert/config regeneration take place

We just found the problem for our daily VPN Client connection losses after 8 hors in the VPN SSL Advanced Cryprographic settings. The key lifetime is set by default to 28800 sec which corresponds to exactly 8 hours.

Now if we change the value to 16 hours and eventually change the key size to 2048 bit (which can be omitted) will the user certificates and/or the SSL VPN configuartion change in a way where users will be forced to download a new configuration updater from the User Portal to be able to connect again?

I'm asking because in that case I will have to prepare and educate our users before the change takes place.

BTW: does a increased keysize also needs a higher cpu performance on the router and on the endpoint?



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