Why my nginx sub_filter reverse-proxy not working?

On your reverse proxy configuration, make sure accept all encoding:

Example:

location / {
proxy_pass http://backend-server;
proxy_set_header Accept-Encoding “”;
proxy_set_header Host backend-server.tld;
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_redirect off;

sub_filter “<title>” “<title>Judul “;

sub_filter_types *;
sub_filter_once off;
}

 

 

SOURCE
https://stackoverflow.com/questions/31893211/http-sub-module-sub-filter-of-nginx-and-reverse-proxy-not-working