我有一个* .ovpn配置文件，用于在Mac OSx上使用tunnelblick成功连接。当我在debian jessi中尝试相同的文件时，出现以下错误：
/usr/sbin/openvpn --config vpnserver.ovpn
OpenVPN 2.3.4 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [EPOLL] [PKCS11] [MH] [IPv6] built on Jun 26 2017
library versions: OpenSSL 1.0.1t 3 May 2016, LZO 2.08
Enter Private Key Password: **********
WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Control Channel Authentication: using '../ta.key' as a OpenVPN static key file
Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Socket Buffers: R=[212992->131072] S=[212992->131072]
NOTE: UID/GID downgrade will be delayed because of --client, --pull, or --up-delay
UDPv4 link local: [undef]
UDPv4 link remote: [AF_INET]xx.xx.xx.xx:1194
TLS: Initial packet from [AF_INET]xx.xx.xx.xx:1194, sid=c94788bf bfb6fe5d
TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
TLS Error: TLS handshake failed
SIGUSR1[soft,tls-error] received, process restarting
Restart pause, 2 second(s)
我不确定在debian系统上缺少什么。我是否需要安装其他lib或alter config文件？