squid代理只能访问https://www.google.com

最近碰到一个奇葩事情。想用squid搭一个代理用来过墙，发现只能访问google.com加密版。其他任何网站都是访问超时。

dns是在服务器上搭建。
服务器过墙的方式是cisco vpn.


这是squid的配置。
2013/07/30 15:23:27| Processing Configuration File: /etc/squid3/squid.conf (depth 0)
2013/07/30 15:23:27| Processing: acl manager proto cache_object
2013/07/30 15:23:27| Processing: acl localhost src 127.0.0.1/32 ::1
2013/07/30 15:23:27| Processing: acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
2013/07/30 15:23:27| Processing: acl SSL_ports port 443
2013/07/30 15:23:27| Processing: acl Safe_ports port 80 # http
2013/07/30 15:23:27| Processing: acl Safe_ports port 21 # ftp
2013/07/30 15:23:27| Processing: acl Safe_ports port 443 # https
2013/07/30 15:23:27| Processing: acl Safe_ports port 1025-65535 # unregistered ports
2013/07/30 15:23:27| Processing: acl CONNECT method CONNECT
2013/07/30 15:23:27| Processing: http_access allow all
2013/07/30 15:23:27| Processing: http_access allow manager localhost
2013/07/30 15:23:27| Processing: http_access deny manager
2013/07/30 15:23:27| Processing: http_port 3128
2013/07/30 15:23:27| Processing: coredump_dir /var/spool/squid3
2013/07/30 15:23:27| Processing: refresh_pattern ^ftp: 1440 20% 10080
2013/07/30 15:23:27| Processing: refresh_pattern ^gopher: 1440 0% 1440
2013/07/30 15:23:27| Processing: refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
2013/07/30 15:23:27| Processing: refresh_pattern . 0 20% 4320