AnyConnenct Secure Mobility Client connect issue

[dimitri.schweigerdt1]

Hello

i am getting the following message if i try to connect to the customer network via the AnyConnect VPN Client 3.1.06073:

"The VPN connection was terminated to enforce a newly determinated tunnel MTU and could not be automatically re-istablished. A new connection is necessary, which requires re-authentification."

If i try to reconnect, i am getting the same message again.

How i can fix it?

my notebook configuration:

lenovo t440s

Windows 8.1 64bit

Only Windows Firewall is active.

I can succesfully connect to the same customer network from my another notebook with Windows 7.

Thanks

Dimi
 

[Mustafa Mubdir]

Hi,

I hope those link can help you ;)

http://www.cisco.com/c/en/us/support/docs/security/anyconnect-secure-mobility-client/116881-technote-anyconnect-00.html

https://supportforums.cisco.com/discussion/11159936/cisco-anyconnect-vpn-client-keeps-reconnecting

Br,

Mustapha

[dimitri.schweigerdt1]

thank you Mustapha. I'll will check it out.

[MSJ1]

Hello - Curious what was the resolution for this issue  ?

[liliu24]

Hello

I have same message if I try to connect to the customer network via the AnyConnect VPN Client 4.5.03040"

"The VPN connection was terminated to enforce a newly terminated tunnel MTU and could not be automatically re-established. A new connection is necessary, which requires re-authentication."

If i try to reconnect, the connect will stop about one minutes later and same message repeat again

How i can fix it?

my notebook configuration:

Dell Latitude 5410 

Windows 10 Enterprise

[MSJ1]

I had DTLS Port Blocked before the VPN Firewall. Did you check if you have DTLS enabled  ?

You can check with

show vpn-sessiondb anyconnect ....