Opening a new IP Port?

Hello, I am trying to run a server on my Z1 PYNQ board to send data over ethernet from another device in the network. The issue is that I want to create a socket with a specific port number and it seems like all unused ports are firewalled. I tried opening them with ufw, but it seems iptables is also missing in the distro. Anyone know of a way to unlock a new port in the PYNQ image kernel?