Request proxying, hiding the real ip address

Question

linux

Hello! I am interested in the question of what software should be used to set up a proxy server that will redirect requests to a real address and receive responses from it.
Similar implementation https://ddos-guard.net/ru/retail/#remote-websites-... to filter requests.
I need to hide the address of my provider so that complaints from copyright holders come to the post office.

Answer 1

for http/smtp/pop3/imap nginx is enough.
Or you can use iptables to do DNAT

Answer 2

Thanks, figured it out myself. Output - nginx
server {
listen 80;
location / {
proxy_pass http://site.ru:80;
proxy_set_header Host site.ru;
proxy_set_header X-Real-IP $remote_addr;
proxy_http_version 1.1;
}
}

Answer 3

Yes, you correctly found the way out, but your real ip can be calculated from the emaila header. Think about it.