I am trying to proxy tomcat using nginx. I have this configuration below. Now the problem I am facing is if I access the url by IP(192.168.2.6) then it gets redirected to /auth_app is tomcat which is perfectly fine. The tomcat url redirect to a third party SAML2 provider and once it authenticated it redirected to http://localhost:8080/auth_app/ instead of http://192.168.2.6/auth_app/ and because of that my application doesn't open as tomcat is running on 192.168.2.6 and not localhost.

server {
listen 80 default_server;
server_name _;
error_log /var/log/nginx/abc_error.log;
access_log /var/log/nginx/abc_access.log;
rewrite ^/?$ /auth_app;
location /auth_app {
proxy_redirect off;
proxy_set_header X-Forwarded-Host $host;
proxy_set_header X-Forwarded-Server $host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://localhost:8080/auth_app/;
}
}