I am using version 7.65 on Ubuntu 10 as a reverse proxy. The backend server is running asp pages on iis6. I have the following in my nginx conf file -

gzip on;
gzip_disable "MSIE [1-6]\.";
gzip_buffers 16 8k;
gzip_http_version 1.1;
gzip_comp_level 8;
gzip_min_length 0;
gzip_vary on;
gzip_proxied any;
gzip_types text/plain text/css text/xml text/javascript application/xml application/x-javascript;

When this is on I get the content-encoding gzip header and transfer-encoding chunked. I do not get a content-length header. When I check compression by going to a couple of websites that confirm compression they tell me the page is not compressed.

If i turn off the gzip I do not see the gzip and chunked headers but do see content-length.

What do I need to change to get gzip compressing the pages? The content type of the pages is text/html in almost every case.