How can I make VirtualBox networking accessible from my Mac?

I've configured a Kubeetes cluster via a tutorial (https://github.com/pires/kubeetes-vagrant-coreos-cluster).

$ kubectl get services
NAME           CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
frontend       10.100.235.64    <none>        80/TCP     20m
kubeetes     10.100.0.1       <none>        443/TCP    35m
redis-master   10.100.33.48     <none>        6379/TCP   20m
redis-slave    10.100.179.162   <none>        6379/TCP   20m
$ kubectl get pods
NAME                            READY     STATUS    RESTARTS   AGE
frontend-1211764471-36a7k       1/1       Ruing   0          20m
frontend-1211764471-pua9o       1/1       Ruing   0          20m
frontend-1211764471-u1z67       1/1       Ruing   0          20m
redis-master-2353460263-rvr97   1/1       Ruing   0          20m
redis-slave-1691881626-8rsz7    1/1       Ruing   0          20m
redis-slave-1691881626-f88ec    1/1       Ruing   0          20m

There is absolutely no way I can access any of the IP's unfortunately, all telnets time out. NAT networking is set up for the virtual machines.

How can I have networking working and have the IP's and ports easily accessible from my Macbook?