基于squid3.5.27的ssl代理服务器搭建（简易版）

最近因业务需要调研一款对内网的加密流量进行内容监控的方案，初步发现可以利用squid做ssl代理进行流量导出分析，有点类似于中间人攻击，但是受到的限制很多，而且需要在绝对受信任的情况下才能部署，最终是否利用还难说，squid的ssl代理的编译安装就不做介绍，下面分享一份简易版的配置文件，测试机利用Ubuntu14.04，squid版本3.5.27：

#
# Recommended minimum configuration:
#


# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7       # RFC 4193 local private network range
acl localnet src fe80::/10      # RFC 4291 link-local (directly plugged) machines


acl SSL_ports port 443
acl Safe_ports port 80 # http
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 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 CONNECT method CONNECT


#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports


# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports


# Only allow cachemgr access from localhost
http_access allow localhost manager
http_access deny manager


#忽略无效证书，对内网安全有影响，慎重
sslproxy_cert_error allow all
sslproxy_flags DONT_VERIFY_PEER


# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on "localhost" is a local user
#http_access deny to_localhost


#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#


# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
acl badsite url_regex -i people\.com\.cn
acl badsite url_regex -i google
http_access deny badsite   #网站访问限制，一定要放在下面2语句之前


http_access allow localnet
http_access allow localhost


# And finally deny all other access to this proxy
#http_access allow all


# Squid normally listens to port 3128
#http_port 10.20.13.232:3128


#指定监控的网卡与端口，下面的证书需要自己生成，用于对Web服务器证书重新签发，在内网web浏览器上也需要安装自签发的根证书，否则某些浏览器会因为证书无效无法显示网页
http_port 10.20.13.232:3128 ssl-bump cert=/etc/squid/my.cert key=/etc/squid/my.private generate-host-certificates=on dynamic_cert_mem_cache_size=4MB


acl monitoredSites ssl::server_name .taobao.com
acl monitoredSites ssl::server_name .baidu.com
acl monitoredSites_re ssl::server_name_regex -i \.csdn
ssl_bump bump monitoredSites  #指定ssl代理的网站
ssl_bump bump monitoredSites_re #同上
#ssl_bump bump all


# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/cache/squid 100 16 256


# Leave coredumps in the first cache dir
coredump_dir /var/cache/squid
cache_effective_user squid 


#
# Add any of your own refresh_pattern entries above these.
#
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern . 0 20% 4320