Unable to leverage Connected local VPN inside the Docker image

Expected behavior

I’ve to use the application which is accessible only after getting connected to Cisco IPSec VPN on the local.
I’m using docker on my local able to run the container with firefox in it.
I’m able to access all other public address like, www.google.com however unable to access the client’s application in it.

While using images given in
https://github.com/SeleniumHQ/docker-selenium, I’m able to launch the container and launch firefox in it.

Actual behavior

Not able to access the client URL

Information

  • the output of:
    • Moby Menu > Diagnose & Feedback on OSX
  • a reproducible case if this is a bug, Dockerfiles FTW
  • page URL if this is a docs issue or the name of a man page
  • host distribution and version ( OSX 10.10.x, OSX 10.11.x, Windows, etc )

Steps to reproduce the behavior