FortiClient VPN disconnect occasionally during remote session

[erosner]

Hello,

Very happy with the ForitClient VPN for the purpose of remote desktop to my office computer.

Lately, after updating the Client to version 7.0.1.0083 , I noticed that every time I leave my PC for few minutes (making me some coffee) when I return the VPN is disconnected. This is something new that didn't occur while using the previous version.

I attach a logfile with few occurrences of disconnection.

Basically what I see in the log file is:

10/1/2021 10:17:33 AM error sslvpn FortiSslvpn: 36320: error: poll_send_ssl ->SSL_get_error(): 5, try:1 10/1/2021 10:17:33 AM error sslvpn FortiSslvpn: 36320: error: poll_send_ssl -> [style="background-color: #ffff00;"]WSAGetLastError():2745[/style], try:1 10/1/2021 10:17:33 AM error sslvpn FortiSslvpn: 36320: error: poll_send_ssl ->data size: 51, try:1 10/1/2021 10:17:33 AM error sslvpn FortiSslvpn: 36320: [handle_driver_read_event]: error: poll_send 10/1/2021 10:17:35 AM info sslvpn FortiSslvpn: 26580: Ras: connection to fortissl terminated

Searched for this: WSAGetLastError():2745  and found this in FORTINET:

FortiClients can sometimes have connection issues with SSLVPN. This sometimes includes error messages as follows:

Error    VPN    FortiSslvpn: 2148: error: poll_send_ssl -> WSAGetLastError():2745, try:1 Error    VPN    FortiSslvpn: 10908: error: poll_recv_ssl -> WSAGetLastError():2746

These errors are Windows Socket event errors, expressed in hexadeximal format. WSAGetLastError():2745, is the equivalent of error code 10053.

And the error code 10053 in Windows socket error codes list:

WSAECONNABORTED10053Software caused connection abort.An established connection was aborted by the software in your host computer, possibly due to a data transmission time-out or protocol error.

So, it seems like something in my Host computer that disconnect the connection.

What should I look for? Any idea? 

Thanks for your help,

Eylon

[ccn-techsupport]

Is there any solution to this problem? We are facing the same issue? 

[KrystianNet]

We have same issue.

Did You find out any solution for this?

We were trying on muliple FC versions. Same result for random workstations.

[jzaka]

We have the same issue.  I was wondering if anybody found a solution to this issue?

We have multiple FC versions. The error below seems to be common denominator.  Thank you.

"sslvpn   FortiSslvpn: 15780: error: WSAEnumNetworkEvents FD_CLOSE (10053)"

[Arzka]

Just identical with my case...Still no ideas?

[JTOLvF2]

I am currently looking into this issue as well. Some things we have noticed however is that this is happening exclusively to users with a cable connection xfinity/comcast/spectrum. All disconnects are proceeded by WSAEnumNetworkEvents FD_CLOSE (10053). After switching to another provider even a hotspot the connection is stable for the user and no longer disconnects.

[Edoardo76]

Someone have idea how to fix it?

[Arzka]

In my case, upgrading client to  7.0.6 helped a lot.

[Edoardo76]

we still have it with 7.0.7 :(

[miciti]

We had to activate "DTLS Tunnel" in FortiClient settings to get a stable connection. Maybe that works for you too