请教 squid 2.7 tcp_denied/403问题？

lwq

部分配置如下：
acl SSL_ports port 443 563 5000
acl Safe_ports port 80 # http
acl Safe_ports port 81 # https
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 8002 # zjg eport
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl Safe_ports port 25
acl Safe_ports port 110
acl CONNECT method CONNECT

acl mynetwork src 172.21.55.0/24
acl mmxfile urlpath_regex -i \.mp3$ \.avi$ \.torrent$ \.rmvb$ \.rm$ \.ts$ \.wmv$ \.wma$ \.flv$ \.mpeg$ \.ra$ \.mpe$ \.smi$ \.3gp$ \.mp4$ \.td$ \.td.cfg$
acl disable_site dstdomain "/usr/local/etc/squid/deny_site.txt"
http_access deny disable_site
http_access deny mmxfile
http_access allow mynetwork
http_access deny !mynetwork
http_access allow manager localhost
http_access deny manager
http_access allow Safe_ports
http_access deny !Safe_ports
#http_access deny CONNECT !SSL_ports
http_access allow localnet
http_access deny all
broken_vary_encoding allow apache

大部分网站都能正常运行，但是访问某个网站是出现403错误，部分日志如下：
1271136593.745      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136597.022      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136669.964      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136780.908      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136798.511      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136860.089      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271136880.377      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137001.592      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137004.864      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137121.593      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137126.987      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137158.866      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137183.418      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137215.885      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137231.915      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137238.642      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137290.616      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137612.972      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137673.444      0 172.21.55.150 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137815.164      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271137818.012      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138009.903      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138038.106      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138041.171      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138053.560      0 172.21.55.153 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138213.863      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138222.057      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138255.085      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138333.087      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138696.359      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138849.193      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271138871.311      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271139406.958      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271139652.930      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271139854.800      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271140092.491      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271140163.033      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271140409.778      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271140424.422      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271141012.669      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271141049.754      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271141072.719      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271141075.178      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html
1271141077.888      0 172.21.55.15 TCP_DENIED/403 1356 CONNECT 10.10.255.7:8002 - NONE/- text/html

请大家帮忙解决！谢谢了。

vitas333_cu

negative_ttl 0 minutes  

这样可以不缓存  http 的一些 错误代码 比如 403, 503, 204等等..