Earlier quoted context omitted.
iptables on your phone? I think you would need to root your phone, if it's Android.
I think it's not unreasonable for a techie to be the admin of their own phone. (I still don't get how this is an unpopular opinion.)
Not unpopular, just unrealistic. You can't do it on an iPhone, and if you're doing local web development you really ought to be checking it on an iPhone.