L2TP连接失败

Question

我对L2TP有个问题。我使用Ubuntu18.04并安装了网络管理器- L2TP，网络管理器-L2TP-GNOME，但我未能连接公司的L2TP虚拟专用网。下面是syslog。

Jul  1 18:13:24 linyong-PC charon: 12[ENC] parsed INFORMATIONAL_V1 request 4104919682 [ N(NO_PROP) ]
Jul  1 18:13:24 linyong-PC charon: 12[IKE] received NO_PROPOSAL_CHOSEN error notify
Jul  1 18:13:24 linyong-PC NetworkManager[1077]: establishing connection 'dcbd7b48-3e65-4b14-92c7-f906f159cd70' failed
Jul  1 18:13:25 linyong-PC NetworkManager[1077]: Stopping strongSwan IPsec...
Jul  1 18:13:25 linyong-PC charon: 00[DMN] signal of type SIGINT received. Shutting down
Jul  1 18:13:25 linyong-PC nm-l2tp-service[23236]: g_dbus_method_invocation_take_error: assertion 'error != NULL' failed
Jul  1 18:13:25 linyong-PC NetworkManager[1077]: <info>  [1561976005.2076] vpn-connection[0x555810a8c810,dcbd7b48-3e65-4b14-92c7-f906f159cd70,"VPN 1",0]: VPN plugin: state changed: stopped (6)
Jul  1 18:13:25 linyong-PC NetworkManager[1077]: <info>  [1561976005.2122] vpn-connection[0x555810a8c810,dcbd7b48-3e65-4b14-92c7-f906f159cd70,"VPN 1",0]: VPN service disappeared
Jul  1 18:13:25 linyong-PC NetworkManager[1077]: <warn>  [1561976005.2133] vpn-connection[0x555810a8c810,dcbd7b48-3e65-4b14-92c7-f906f159cd70,"VPN 1",0]: VPN connection: failed to connect: 'Message recipient disconnected from message bus without replying'

我能够连接Windows 10中的VPN，我不知道我是否错过了一些配置。我能做什么?

Answer 1

VPN服务器不接受strongSwan默认建议，因此需要在NetworkManager-L2TP的IPsec配置对话框中输入第1&2算法建议。

参见Windows使用的第一阶段和第二阶段算法的包自述文件：

• https://github.com/nm-l2tp/NetworkManager-l2tp/tree/1.2.10#example-workaround-for-3des-sha1-and-modp1024-broken-algorithms