If you are using wireless, try to connect with cable.
After some time the software client deletes the VPN tunnel. It will be able to connect but that’s all. using Cisco VPN 5.0.0.7 under Windows 10, sometimes appears the error in image below when try to connect and the only way to fix that error is rebooting the. In this case the user will not be able to send or receive traffic at all. The VPN client is behind a NAT device and the VPN Server doesn’t have NAT-T enabled.The VPN client is using connecting on TCP and the default TCP port 10000 for NATT is blocked.The user is behind a firewall that is blocking ports UDP 4500/500 and/or ESP.The internet connection is not stable and some packets are not reaching the VPN concentrator/server or the replies from the server/concentrator aren’t getting to the client, hence the client thinks the server is no longer available.
If you face this error, please try any of following Solution Solutions: I was expecting that its error just because of “ Internet Connection Sharing” issue in Windows with Cisco VPN Client but this time it was because of poor internet connectivity.
Here is brief error message that I experience on Cisco VPN Client Cisco VPN Client Reason 412 “The Remote Peer is no Longer responding”.“Secure VPN Connection terminated locally by the Client.Reason 412 : The Remote peer is no longer responding.Connection terminated on : 14:57:12 Duration: 0 days(s), 00:00:00” One of network user calls me that he is not able to connect to VPN Server and its giving again and again an error message Cisco VPN Reason 412 The remote peer is no longer responding.