help me in reducing the spam of the printer by filtering only the ip that can access the ports

I am looking for a freelancer to help me reduce the spam on my laser printer by filtering only the IP addresses that are allowed to access specific ports. I have a list of allowed IP addresses that need to be filtered, but I need help determining which ports to filter. The problem is that we can't enter into the router so you need to advice me if I can buy an external device to do the filtering or software.

Ideal skills and experience:
- Experience with printer security and IP filtering
- Knowledge of network protocols and port filtering
- Familiarity with laser printers and their security features