Unable to establish vpn connection

[naama]

This error appears to our customers who used Forticlient to connect VPN.

based on each customer I upgrade and downgrade the clients in  customers PC based on the situation of each customer , the issue solved temporary but it repeating again from time to time and i am repeating the same steps to solve the issue.

kindly advice me if there is any permanent solution.

 on the other hand, another issue appears like the "Client connecting and disconnecting". I solved by remove the current client and install new ,and restart the PC, then it solved, but all this solutions are temporary and I am searching for better solutions.

kindly advice

thanks

[MikePruett]

Did it work previously before? If so, what changed?

What version of FortiOS is the Gate running and what version of FortiClient is the endpoint running?

[Toshi_Esumi]

At least two of our SSL VPN users got the exact error message with their FortiClient(VPN only). I won't say  the only one cause would show the error, but those two cases seemed to be related to Windows Updates. I told them to reboot their PCs at least a couple of times for WinUpdates to complete clean-up. One of them claimed he needed to boot four times. But after that they worked fine.

[naama]

yes it was working fine , the issue appears from last 3 weeks, and even  i tried various below procedures , they were only temporary solution , it will work but the issue will repeat after one to two weeks .

-rebooting ,upgrading the client and downgraded depends on each case of customer.

- i tried to install WAN mini port repair tool and do restart , then again install mini port installer tool and restart .

- instead of client i ask the user to use browser but the same issue appears from time to time and I just solved it , by disable "Enable Enhanced Protected"

I tried all above solutions and the issue solved temporary and repeated again .

I am searching for the best solution which is stable for windows 7 /8 /10.

current ios version 5.2

[naama]

I hope any one can advice me

thanks

[Alby23]

I imagine you've already tried this steps (even if your issue is different from the reported one):

http://kontech.net/forticlient-vpn-connection-getting-stuck-at-status-98/

[Toshi_Esumi]

And, again, check when last time windows updates happened in the history.

[MasterBratac · Accepted solution]

For me it was a TLS version mismatch on Fortigate and IE settings.

Check this link:

http://www.layer8.one/for...-may-be-unreachable-5/

[v_mashouri]

hi everyone

I had this error and solved by change  the IE setting .

IE > Tools menu > Intenet Options > Advanced tab > Use TLS 1.1  or Use TLS  1.2

thanks MasterBratac

[emnoc]

One more item that needs to be considered, ensure that no layer7 device is blocking your connection like a proxy. This is over looked in  9 out 10 cases that I've have seen.

Ken