pmaports/main/postmarketos-config-nftables/rules/50_vncserver.nft

#!/usr/sbin/nft -f

table inet filter {
        chain input {
                # drop VNC from wwan
                iifname "wwan*" tcp dport 5900 drop comment "drop VNC from wwan"
                
                # allow vnc
                tcp dport 5900 accept comment "accept VNC"
        }
}