sub_filter_once off; nginx

 server {

listen 192.168.85.1:80;

server_name server-talk.com;

root /home/aaa/public_html;

access_log /usr/local/nginx/logs/aaa.com.access.log;

error_log /usr/local/nginx/logs/aaa.com.error.log;

sub_filter_once off;

sub_filter 'http://aaa.com/data/' 'http://cdn.aaa.com/data/img/';}