NAS has no Internet Access

Hi!

My setup of the firewall looks like following:

Port 1 is used for LAN (Printer, Mobile Phone, Printer, Laptop) with the interface IP 192.168.1.254/255.255.255.0 (DHCP enabled from 192.168.1.1 to 192.168.1.19)

Port 2 is used for WAN with the interface IP 192.168.0.145/255.255.255.0

Port 3 is used for "DMZ" (NAS) with the interface IP 192.168.100.254/255.255.255.0 (DHCP enabled from 192.168.100.1 - 192.168.100.9)

I can access the NAS from my Laptop (LAN) in the LAN or DMZ network, with a static oder a dhcp address. What I have not yet managed to connect the NAS from port 3 to the Internet. When the NAS is on Port 1, the Internet Connection is no problem. The firewall allows DNS Requests form the NAS to 8.8.8.8 from Port 3 to Port 2. The NAS and the Plex Server on the NAS are reporting that no Internet Connection is available. With my Laptop I can access the Internet without any problems.

I have two rules, one for the internet connection

an one rule for the access to my NAS in the DMZ Zone

Can anybody help me to get the NAS to the internet?