Windows 10 and Anyconnect dropping connections

[Do0G]

Hi,

Just looking to put this down and see if it flags anything.

Windows 10 1909 build. Cisco Anyconnect 4.8.02045.

Every 8 mins the VPN connection drops, reconnects fine. 

Promon shows nothing unusual in windows at the time. 

Wireshark shows the usual retransmits but that will be because the tunnel is dropping. 

The wifi connection doesnt drop and the laptop is still connected when anyconnect attempts a reconnect. 

Tried the power option, WLAN switching, GPO on sim connections. Tried different versions of Anyconnect. 

Ironically, it works fine and dandy when connected to phone and tethering. 

Any thoughts?

[Mohammed al Baqari]

If you are saying that it doesn't drop on 4G, then something wrong with
your provider or LAN modem. Just for precautions ensure that dtls is off
and try to reduce mtu.

***** please remember to rate useful posts

[Aref Alsouqi]

I agree with Mohammed, it seems to be an issue with your gateway rather than the headend or the client itself. When the client reconnects, does it still use DTLS or it switches to TLS? I would check the logs on the gateway anyway.

[Do0G]

Well, the MTU was changed to 1406 and no change to the dropping of the VPN connection. The wifi connection stays up though.

[Mohammed al Baqari]

Open a ticket with provider.