[WLUG] Debian 12 networking

I installed Debian 12 on a PI4. I got rtl_433 working and receiving data while connected to the pi4 using ssh. Once that was accomplished I rebooted via "sudo shutdown -r now" to verify that all the settings would survive a reboot. When the pi rebooted it was no longer available on the network. I connected to the pi4 console directly and received this message at the login screen "filtering via arp/ip/ip6tables is no longer available by default". I am new to debian and not having ifconfig available is a real handicap for me. Can someone please offer some advice or point me to resources that will help me fix this issue. Searching the internet has not offered any helpful resources so far. Thanks, Mike