How to redirect all sites to localhost?

Question

linux

There is an open wifi hotspot with debian (on raspberry pi).
It is required that when devices are connected, requests for port 80 are redirected to the local web server.
Something like how it is done when connecting to public access points, only easier - without authorization and without the ability to access the Internet.

Answer 1

Replace foo_serverip with internal address

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -m conntrack --ctstate NEW -j DNAT --to foo_serverip:80
iptables -t nat -A PREROUTING -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -A POSTROUTING -t nat -j MASQUERADE

Answer 2

iptables redirect to localhost?