host shares the same network with container cant have second container

[fatjoni]

Hello,

I am trying to create a pptp connection through a base ubuntu image ( docker run -d -it --net=host --name ubuntu2 ubuntu:18.04) and everything works only if i use net=host. The problem that arises is that the host gets to share vpn connection too. Thus i cannot create a second docker in the same host. They conflict with each other. Is there any way i can install in my host (ubuntu 17.10) docker 1.3 that you mentioned cuz it seems old and i can't find anywhere any manual how i can do it. Or how can i isolate the network to be only inside the container? Please let me know cuz it is really important for me. Regards