note ~ i do not get prompted to Allow USB debugging 'that references the RSA key fingerprint'. OnePlus does show the icon and 'USB debugging connected'. and the above command isn't working as originally posted.

Code:
iptables -L
Chain INPUT (policy ACCEPT)
 target     prot opt source               destination

 Chain FORWARD (policy ACCEPT)
 target     prot opt source               destination

 Chain OUTPUT (policy ACCEPT)
 target     prot opt source               destination