Centos7下使用Squid快速搭建带认证的HTTP代理服务器
在centos下很容易就可以搭建好一个HTTP代理服务器，搭建一个socks5代理更是简单的不用说！
不管是测试用途还是自己使用，Squid都是一个很不错的代理工具！他支持正向代理，反向代理，还有透明代理！老高最近搭建了一个简单的squid的正向代理，随便记记笔记！
如果只是想使用代理而不需要认证功能，tinyproxy也是不错的选择！
安装
安装狠简单！
yum install squid -y
yum install httpd-tools -y
生成密码文件
mkdir /etc/squid3/
# laogao 是用户名
htpasswd -cd /etc/squid3/passwords laogao
# 提示输入密码，在此老高设密码为 phpgao
# 注意密码不要超过8位
测试密码文件
/usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
# 输入 用户名 密码
laogao phpgao
# 提示OK说明成功，ERR是有问题，请检查一下之前步骤
OK
# 测试完成，crtl + c 打断
配置
vim /etc/squid/squid.conf
# 在最后添加
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access allow authenticated
# 这里是端口号，可以按需修改
# http_port 3128 这样写会同时监听ipv6和ipv4的端口，推荐适应下面的配置方法。
http_port 0.0.0.0:3128
权限控制
squid的权限控制很灵活，具体配置方法可以参考官方文档，或者Squid中文权威指南，具体工作原理有点像iptables，用规则去卡控流量。默认的配置只能允许内网用户访问，如果有更多需求，你还可以指定很多规则！
acl Foo src 8.8.8.88
# 以下例子来自Squid中文权威指南
acl Foo src 172.16.44.21/255.255.255.255
acl Foo src 172.16.44.21/32
acl Foo src 172.16.44.21
acl Xyz src 172.16.55.32/255.255.255.248
acl Xyz src 172.16.55.32/28
acl Bar src 172.16.66.0/255.255.255.0
acl Bar src 172.16.66.0/24
acl Bar src 172.16.66.0
如果看不懂，并且只是想用暂时试试squid的功能，老高有一个万金油方法：
# 这个IP地址池匹配所有可能的IP地址，但是这样做是有风险的，因为所有人都可以使用你的代理了，不要怪老高没有提醒啊！
acl localnet src 0.0.0.1-255.255.255.255
日志
squid的日志默认是打开的，位于目录/var/log/squid/，当然这个地址还有日志的格式都是可以完全自定义的！具体还是看文档吧。
liguangping ll /var/log/squid/
total 52K
-rw-r----- 1 squid squid 14K May 25 11:50 access.log
-rw-r----- 1 squid squid 6.0K May 20 17:14 access.log-20160522.gz
-rw-r----- 1 squid squid 23K May 25 11:50 cache.log
-rw-r----- 1 squid squid 1.2K May 20 11:22 cache.log-20160522.gz
启动服务
# 启动
systemctl start squid.service
# 停止
systemctl stop squid.service
# 重启
systemctl restart squid.service
您好，问一下
我可以正常启动，但是实际测试是无法联网的
这是我的 squid.conf
#
# 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
acl Foo src 8.8.8.88
# 以下例子来自Squid中文权威指南
acl Foo src 172.16.44.21/255.255.255.255
acl Foo src 172.16.44.21/32
acl Foo src 172.16.44.21
acl Xyz src 172.16.55.32/255.255.255.248
acl Xyz src 172.16.55.32/28
acl Bar src 172.16.66.0/255.255.255.0
acl Bar src 172.16.66.0/24
acl Bar src 172.16.66.0
#
# 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
# 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
http_access allow localnet
http_access allow localhost
# And finally deny all other access to this proxy
http_access deny all
# Squid normally listens to port 3128
http_port 3128
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256
# Leave coredumps in the first cache dir
coredump_dir /var/spool/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
# 在最后添加
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access allow authenticated
问一下，您的squid 用的哪个版本？ ncsa模块不需要编译吗？
默认仓库里的
squid服务启动不了啊
看看错误日志
内网代理是没问题的，但是外网好像就不行了额
看你绑定的网卡和防火墙的设置了