I have a block of 5 IP's that I got from my ISP

I have been trying to find out how to add them to a few servers as an end goal.

I have managed to get it working so I can reach the server using the public IP 

I can't however get the server to be able to ping anything online, I also can't get the server to ping from the internet to the server using an online site 

I added the server to the router as a DMZ and that didn't fix the issue of pinging both ways. 

I have unchecked to block WAN ping and that didn't help either. 

Thanks for all those that have submitted response if you are seeing this and helped on Facebook. 

The IP range is 152.x.x.90-94

they stated a net mask of 255.255.255.248

I have ran tests and can only get traffic routed if I use a default route of .89