Netscaler Knowledgebase

Problem:  The system doesn't modify content that is already compressed before being received
Solution:  Tested with 8.1 build 32.1, but should apply to 7.0+ with little modification

add rewrite action "remove-ae" delete_http_header "Accept-Encoding"
add rewrite policy "remove-ae" true "remove-ae"
bind rewrite global "remove-ae" 10 NEXT -type REQ_DEFAULT

Yep, the NS itself will parse and flag the request as compression acceptable--it will remove the header right before sending it to the server itself.  In the response chain, things are a little different, as rewrite is the first (not last) thing processing, so you can control response-side behaviors in the NS with rewrite.

The Oracle