I want to setup proxy for my netgear router. Everything works with ip: both with http and https. But when i try to enter the site through nginx proxy it returns 403. It doesnt make sense because login page shows up correctly. I tried to set Origin header like they advise here but it just doesnt work.

https://www.reddit.com/r/nginx/comments/g7a6da/comment/fogiil0/

log from nginx:

192.168.5.2 - - [19/Nov/2023:12:46:02 +0000] "GET /base/images/Registration_on.gif HTTP/1.1" 403 25 "https://netgear.mysite.com/base/cheetah_login.html" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36"
192.168.5.2 - - [19/Nov/2023:12:46:02 +0000] "GET /base/images/TurnOff_on.gif HTTP/1.1" 403 25 "https://netgear.mysite.com/base/cheetah_login.html" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36"
192.168.5.2 - - [19/Nov/2023:12:46:02 +0000] "GET /base/images/TurnOff_off.gif HTTP/1.1" 403 25 "https://netgear.mysite.com/base/cheetah_login.html" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36"

my config. I use very similar one for other things like vaultwarden, proxmox, edgerouter and many other ones and it works ok.

server {
    server_name netgear.mysite.com;
    listen 80;
    return 301 https://netgear.mysite.com$request_uri;
}

server {
    set $DN netgear.mysite.com;
    server_name netgear.mysite.com;
    #listen 80;

    listen 443 ssl;
    ssl_protocols        SSLv3 TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers          HIGH:!aNULL:!MD5;
    ssl_certificate /etc/letsencrypt/live/mysite.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/mysite.com/privkey.pem;

    access_log /var/log/nginx/netgear.mysite.com.access;
    error_log  /var/log/nginx/netgear.mysite.com.error error;

    location / {
        proxy_http_version 1.1;
        proxy_request_buffering off;
        proxy_buffering off; 
        # proxy_set_header        Host $host:$server_port;
        # proxy_set_header        X-Real-IP $remote_addr;
        # proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        # proxy_set_header        X-Forwarded-Proto $scheme;
        
        proxy_pass https://192.168.5.10:443; # tried with http too

        proxy_set_header Origin https://192.168.5.10/; # tried with http too
    }
}

​