[root at test-lighttp bin]# /usr/local/varnish-3.0.2/bin/varnishncsa -F "%{X-Forwarded-For}i %h %l %u %D %t \"%r\" %s %b \"%{Referer}i\" \"%{User-agent}i\"" The following error occurred: Unknown format starting at: %D %t "%r" %s %b "%{Referer}i" "%{User-agent}i"