Internet connection lost when trying to connect to a Fortigate with IPsec VPN through Forticlient

[Alejandro77]

Hello guys,

not sure if someone else has the same issue, but there are times when I'm trying to set up a remote connection tunnel via IPsec and this issue comes up... I'm trying to connect through Forticlient VPN but internet connection stops, the tunnel is (of course) down and the internet access is restored.

[AEK]

Hi Alejandro

Can you share your routing table when IPsec connection is down and when it is up?

[Alejandro77]

that was my first thought too and I checked it.. it was identical! Perhaps I'll need to rephrase: While trying to connect, internet dropped, so the connection never happened. I checked the routing table both times and it was identical

[AEK]

Did you enter the remote server as fqdn or ip?

Also can you share the ipsec config? I mean from FGT side.

[Debbie_FTNT]

It does sound a bit like FortiClient/routing may be set up to send everything through the VPN tunnel (no split-tunnel), and if FortiGate lacks the policies to allow this, internet access would essentially be down after VPN is established.