Using Apache 2.0 (2.0.53) on a particular legacy system, enabling mod_deflate causes directly-served content to be gzip-encoded just fine. However, and this is my problem, content proxied from another server using ProxyPass is not getting gzip-encoded. Wireshark shows me there is no encoding header in the response and the body is in plain text.
I have another similar system, also running Apache 2.0 (2.0.52), where the proxied content IS being gzipped, and I can't find any significant difference between the configuration of the two systems.
mod_deflate is being enabled using a file
The proxying is being done within the
<VirtualHost> section using these lines:
ProxyPass /mtserver http://localhost:8000 ProxyPassReverse /mtserver http://localhost:8000
Can anyone point me at a possible reason for one system not compressing the proxied content?