一、安装openconnect
openconnect是Cisco的AnyConnectSSL VPN的Linux客户端。而NetworkManager-openconnect则是把openconnect的命令行工具，集成到了NetworkManager的图形界面上，它的使用与Window差不多。
$ sudo yum installopenconnect (在Fedora上，会顺带安装：vpnc-script.noarch，这个包会被openconnect用到)
$ sudo yum installNetworkManager-openconnect
二、在命令行下使用openconnect
$sudo openconnect –script /etc/vpnc/vpnc-script https://your-vpn-server.com
Attempting to connect to 121.0.29.22:443SSL negotiation with vpn.taobao.orgServer certificate verify failed: signer not foundCertificate from VPN server "your-vpn-server.com" failed verification.Reason: signer not foundEnter ‘yes’ to accept, ‘no’ to abort; anything else to view: yesConnected to HTTPS on your-vpn-server.comGET https://your-vpn-server.com/Got HTTP response: HTTP/1.0 302 Object MovedSSL negotiation with your-vpn-server.comServer certificate verify failed: signer not foundConnected to HTTPS on your-vpn-server.comGET https://your-vpn-server.com/+webvpn+/index.htmlPlease enter your username and password.Username: your-namePASSCODE: ********POST https://your-vpn-server.com/+webvpn+/index.htmlGot CONNECT response: HTTP/1.1 200 OKCSTP connected. DPD 30, Keepalive 20Connected tun0 as 10.1.25.155, using SSL
三、在NetworkManager上使用openconnect
第一步：创建新的VPN，选择VPN类型为：
第二步：填写VPN服务器，并点Save：
第三步：选择VPN，输入用户名、密码。
只有一条路不能拒绝——那就是成长的路。
