forticlient keeps disconnecting windows 10

Forticlient Keeps Disconnecting Software Installed On

I havent yet seen it happen without any corresponding packet loss or for the extended period of time (1-2 minutes before recovery).

We unfortunately do not (currently) have a support contract that includes in-depth technical support on the FortiClient side and Ive been through the channels on the FortiGate side on everything thats available for them to tell me.

Im hoping someone here has run into similar issues before and been able to find a fix for the problem What Im seeing is fairly frequent drops in connection over the tunnel after its been established.

I cant reliably reproduce it but I can make it more likely to occur by using a worse internet connection, in this case a personal hotspot from an iPhone.

Inexplicably traffic just wont go for up to a couple minutes and then suddenly it recovers and its fine.

At no point during this disconnect does FortiClient complain about being disconnected, it just sits there happily connected to the VPN gateway.

There doesnt seem to be any indicators in the FortiClient logs as to whats happening and nothing gets populated in the Windows event logs either.

This all is made even more confusing by the fact that not every one of our users whos tried this seems to run into this problem.

It happens frequently to a handful of users and almost never for everyone else, so Im thinking the problem is less FortiClient and more Windows related.

We are running version 6.2.1 on our Fortigate and FortiClient 6.0.8 on the workstations.

Firmware bugs aside, maybe its worth looking closer at the Windows installation.

As FortiClient is SSL based, it goes through the normal channels of establishing an SSL connection.

This is subject to your router (ie at your home) working correctly and not dropping sessions.

Forticlient Keeps Disconnecting Software Installed On

Its also subject to any software installed on the computer that may interfere such as other security software.

Do you have any third party AVsecurity software installed Particularly anything that offers firewall services and would turn off (or complement) the one built into Windows That piece of software may be something to look at more closely.

Turn it off temporarily to see if it makes any difference in experience.

You say it stays connected but is dropping, can you check what latency you have while connected and packet loss Is it to any particular internal resource.

The strangest part of this is that I dont have any logs in either the applications own logs or Windows logs.

I dont even really see anything in the logs on the firewall Im connecting to.

Just about the only thing Ive got is from a log that was generated when I set the log level to debug.

The latency will be anywhere between 50-70ms on average, obviously it can vary greatly since its a cellular hotspot connection but typically its 50-70.

No internal resource is available when what Ive been calling the soft disconnect occurs.

So far Ive still seen it but for now its always coincided with packet loss to the internet in general which is expected.

Forticlient Keeps Disconnecting Windows 10