建议tssh添加支持, 类似ssh tun的VPN

[engcn]

ssh使用示例：
ssh ‐f ‐w 0:1 192.168.1.15 true

   SSH‐BASED VIRTUAL PRIVATE NETWORKS
   ssh contains support for Virtual Private Network (VPN) tunnelling  using  the  tun(4)
   network   pseudo‐device,   allowing   two   networks  to  be  joined  securely.   The
   sshd_config(5) configuration option PermitTunnel controls whether the server supports
   this, and at what level (layer 2 or 3 traffic).

   The following example would connect client network 10.0.50.0/24 with  remote  network
   10.0.99.0/24  using  a  point‐to‐point connection from 10.1.1.1 to 10.1.1.2, provided
   that the SSH server running on the gateway to the remote  network,  at  192.168.1.15,
   allows it.

   On the client:
         # ssh ‐f ‐w 0:1 192.168.1.15 true
         # ifconfig tun0 10.1.1.1 10.1.1.2 netmask 255.255.255.252
         # route add 10.0.99.0/24 10.1.1.2

   On the server:
         # ifconfig tun1 10.1.1.2 10.1.1.1 netmask 255.255.255.252
         # route add 10.0.50.0/24 10.1.1.1

[engcn]

可以参照 gost实现, https://github.com/go-gost/gost