The Fortinet vpn ssl is unstable
Hi, we have two Fortigate 300E in HA with Firmware versión 6.2.2. This solution was implemented 4 moths ago. Since that date we have been looking for and testing different solutions to solve the disconnections of the SSL VPN, in some cases it is disconnected and in most cases the problem is that sensitive applications fall after a few minutes, applications such as RDP, SAP include other services like file server service.
We currently have a case with Fortinet support, but two months have gone by without any progress.
Anyone else had similar problems with the SSL VPN? Could you solve it in any way? I have read that some opted for IPSEC for this reason.
We have tested the different versions of Forticlient starting with 6.0 and finally the FortiClient VPN 6.2.0 free.
We also tried to modify the MTU with different values in the affected rules, we added the line "set preserve-session-route" so that the sessions are not affected by the changes of routes, try disabled dtls, and change connection with other ISPs. Finally the Fortiner Support recommended me to update the firmware of the fortigate., but the latter didn't work either.
Also we tested disable dtls
I really appreciate if you can help me or tell me about your experiences with Fortinet SSL VPN.