我使用 OpenVPN 连接到工作场所的网络。连接时，连接良好，然后突然断开，并出现以下痕迹。同时，我的路由器的互联网连接也断开了 wifi 和以太网。我必须重新启动路由器才能恢复互联网连接。
Please enter your username and password.
GROUP: [xxxxx]:xxxxx
POST https://xxxx.com/
XML POST enabled
Please enter your username and password.
POST https://xxxxxx.com/
Got CONNECT response: HTTP/1.1 200 OK
CSTP connected. DPD 30, Keepalive 20
Connected tun0 as 192.168.20.101, using SSL
DTLS handshake failed: Resource temporarily unavailable, try again.
DTLS handshake failed: Resource temporarily unavailable, try again.
DTLS handshake failed: Resource temporarily unavailable, try again.
CSTP Dead Peer Detection detected dead peer!
Failed to reconnect to host xxxxxx.com
sleep 10s, remaining timeout 300s
Failed to reconnect to host xxxxxx.com
sleep 20s, remaining timeout 290s
Failed to reconnect to host xxxxxx.com
sleep 30s, remaining timeout 270s
Failed to reconnect to host xxxxxx.com
sleep 40s, remaining timeout 240s
^CSocket connect cancelled
Failed to reconnect to host xxxxxx.com
sleep 50s, remaining timeout 200s
Reconnect failed
我的操作系统是 Ubuntu 16.04。