yum -y install squid
vi /etc/squid/squid.conf
http_port 3128
cache_mem 64 MB
maximum_object_size 4 MB
cache_dir ufs /var/spool/squid 100 16 256
access_log /var/log/squid/access.log
acl localnet src 10.0.0.0/8
http_access allow localnet
http_access deny all

service squid start

客户端配置

Proxy配置
yum設置代理
vim /etc/yum.conf
1
添加：

proxy=http://[proxy-ip]:[port]/

apt設置代理
gedit /etc/apt/apt.conf
1
添加：

Acquire::http::proxy “http://user:pwd@proxy.xxx:8080/“;
Acquire::https::proxy “https://user:pwd@proxy.xxx:8080/“;
Acquire::ftp::Proxy “ftp://username:password@proxyhost:port/“;

wget設置代理
vim /etc/wgetrc
1
添加：

http_proxy = http://[proxy-ip]:[port]/
ftp_proxy = http://[proxy-ip]:[port]/

rpm設置代理
vim /etc/profile
1
添加：

export http_proxy=http://[proxy-ip]:[port]/
export ftp_proxy=http://[proxy-ip]:[port]/

--
echo "export http_proxy=http://ip:port" >> /etc/profile
echo "export https_proxy=http://ip:port" >> /etc/profile

source /etc/profile