我无法从ubuntu 14.04系统通过openconnect VPN客户端进行连接。我曾经在1个月前连接到此VPN，但从那时起，我还没有对VPN客户端设置进行任何更改。
这是我在日志中得到的错误。
POST https://69.195.x.x/
Attempting to connect to server 69.195.x.x:443
SSL negotiation with 69.195.x.x
SSL connection failure: A TLS packet with unexpected length was received.
Failed to open HTTPS connection to 69.195.x.x
GET https://69.195.x.x/
Attempting to connect to server 69.195.244.x:x
SSL negotiation with 69.195.x.x
SSL connection failure: A TLS packet with unexpected length was received.
Failed to open HTTPS connection to 69.195.x.x
我有一些正在使用Windows AnyConnect客户端的队友，并且能够通过Windows计算机连接到VPN。
任何帮助都是非常可观的。