Enable Public Device URL but not IP Address Access

Product support
134

I found that the following worked well for me

iptables -A INPUT -i resin-vpn -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -i resin-vpn -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j REJECT