Windows客户端的日志在安装目录的log/文件夹下；Linux客户端的日志在/var/log/openvpn.log中

问题一：

network is unreachable

TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)

TLS Error: TLS handshake failed.

错误原因：网络不可达，客户端无法访问公网。通过查看客户端是否能够ping通公网，能否通过ssh访问。

问题二：

MANAGEMENT:>STATE:1676379239, TCP_CONNECT,...
TCP: connect to [AF_INET] xxx.xxx.xxx.xxx:1194 failed: Unknown error

错误原因：客户端与服务端的协议类型（TCP/UDP）或者端口不一致导致

问题三：

No server certificate verification method has been enabled

错误原因：SSL证书校验不通过。排查server端的证书是否正确下载，复制到客户端后的配置文件中证书路径是否正确

问题四：

AUTH: Received control message: AUTH_FAILED
TCP/UDP: Closing socket
MANAGEMENT:>STATE: 1676381342, RECONNECTING, auth-failure...

错误原因：客户端用户密码不正确

问题五：

Connection reset, restarting [-1]SIGUSR1[soft, connection-reset] received, client-instance restarting

错误原因：客户端与服务端的时间节点不一致。SSL VPN要求两端的时间节点保持一致。