Remove X-Forwarded-For header in Squid 3.0
Solution 1:
Here's the full list you need:-
via off
forwarded_for off
follow_x_forwarded_for deny all
request_header_access X-Forwarded-For deny all
header_access X_Forwarded_For deny all
Solution 2:
Fixed with:
request_header_access X-Forwarded-For deny all