原文地址：
2.6可以使用_access来控制显示与http的信息，但是在3.0版本中这个参数是用不了的，所以如果要在3.0中http的信息的话，就需要使用另外一个参数：
此参数的使用和header_access的类似，比如要VIA头信息，设置如下
Via deny all
如果需要隐藏其他的信息，可以参考上面的例子，把对应的header更改了就行，http的header信息如下
Accept HTTP_ACCEPT
Accept-Charset HTTP_ACCEPT-CHARSET Accept-Encoding HTTP_ACCEPT-ENCODING Accept-Language HTTP_ACCEPT-LANGUAGE Accept-Ranges HTTP_ACCEPT-RANGES Age HTTP_AGE Allow HTTP_ALLOW Authorization HTTP_AUTHORIZATION Cache-Control HTTP_CACHE-CONTROL Connection HTTP_CONNECTION Content-Base HTTP_CONTENT-BASE Content-Disposition HTTP_CONTENT-DISPOSITION Content-Encoding HTTP_CONTENT-ENCODING Content-Language HTTP_CONTENT-LANGUAGE Content-Length HTTP_CONTENT-LENGTH Content-Location HTTP_CONTENT-LOCATION Content-MD5 HTTP_CONTENT-MD5 Content-Range HTTP_CONTENT-RANGE Content-Type HTTP_CONTENT-TYPE Cookie HTTP_COOKIE Date HTTP_DATE ETag HTTP_ETAG Expires HTTP_EXPIRES From HTTP_FROM Host HTTP_HOST If-Match HTTP_IF-MATCH If-Modified-Since HTTP_IF-MODIFIED-SINCE If-None-Match HTTP_IF-NONE-MATCH If-Range HTTP_IF-RANGE Last-Modified HTTP_LAST-MODIFIED Link HTTP_LINK Location HTTP_LOCATION Max-Forwards HTTP_MAX-FORWARDS Mime-Version HTTP_MIME-VERSION Pragma HTTP_PRAGMA Proxy-Authenticate HTTP_PROXY-AUTHENTICATE Proxy-Authentication-Info HTTP_PROXY-AUTHENTICATION-INFO Proxy-Authorization HTTP_PROXY-AUTHORIZATION Proxy-Connection HTTP_PROXY-CONNECTION Public HTTP_PUBLIC Range HTTP_RANGE Referer HTTP_REFERER Request-Range HTTP_REQUEST-RANGE Retry-After HTTP_RETRY-AFTER Server HTTP_SERVER Set-Cookie HTTP_SET-COOKIE Title HTTP_TITLE Transfer-Encoding HTTP_TRANSFER-ENCODING Upgrade HTTP_UPGRADE User-Agent HTTP_USER-AGENT Vary HTTP_VARY Via HTTP_VIA Warning HTTP_WARNING WWW-Authenticate HTTP_WWW-AUTHENTICATE Authentication-Info HTTP_AUTHENTICATION-INFO X-Cache HTTP_X-CACHE X-Cache-Lookup HTTP_X-CACHE-LOOKUP X-Forwarded-For HTTP_X-FORWARDED-FOR X-Request-URI HTTP_X-REQUEST-URI X-Squid-Error HTTP_X-SQUID-ERROR Negotiate HTTP_NEGOTIATE X-Accelerator-Vary HTTP_X-ACCELERATOR-VARY Other: HTTP_OTHER: