1、UOS桌面操作系统openvpn客户端连接失败，服务端服务报错

journalctl -fu openvpn@server.service

…
WARNING: ‘link-mtu’ is used inconsistently, local='link-mtu 1557, remote='link-mtu 1541
WARNING: ‘tun-mtu’ is used inconsistently, local=‘tun-mtu 1400’, remote=‘tun-mtu 1500

解决方案
查看服务端server.conf配置文件

添加如下信息：
link-mtu 1541
tun-mtu 1500
keysize 128
cipher BF-CBC