VDOM's, Links, VLAN's and WAN

Hello Fortinet Forums,

I've had some contact with people in the Fortinet subreddit but couldnt quite fix my problem. Also the time difference is a big problem for me because I have access to the fortigate unit at different times than when those people can assist me.

Currently I am a student using a Fortigate 200b (FortiOS 5.2.4) which will be used in production in a few months. Now my task is to configure that Fortigate and make it ready.

my class has 6 groups of students that all have 1 public IP address.

Every port has it's own subnet for every single group. I've done this with seperate VDOM's.

Now all ports need to get a public IP Address too.

Now I configured that with 1 port that gets all the IP Addresses from another router.

That currently is let's say, port 10.

Under that port i've configured 6 subinterfaces that all have it's own VLAN.

All those single VLANs are in the same VDOM as where they belong.

I've made a static route which is; 0.0.0.0 / 0.0.0.0 > Gateway

I've made a policy that will allow the traffic between inbound and outbound.

Now here's the problem.

I can ping the external IP addresses and receive a reply, but when i plug a laptop into one of the ports it does not get internet access or anything. I'm out of options how to fix that.

Anyone that can assist me?

regards,