[root@localhost ~]# vi /etc/squid/squid.conf
#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
# 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:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager
# 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
# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
"/etc/squid/squid.conf" 77L, 2510C
以上是squid.conf的初始值。
解释如下：#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1 //定义源地址为本地回环地址的ACL
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 //定义目的地址的ACL
# 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 //定义本地网段的ACL
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 //定义安全端口为443的ACL
acl Safe_ports port 80 # http //定义安全端口为80的ACL
acl Safe_ports port 21 # ftp //定义安全端口为21的ACL
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 //定义连接方式为CONNECT的ACL
#
#auth
auth_param basic program /usr/lib64/squid/squid_db_auth --user cache --password bmv7RfSA --plaintext --persist
auth_param basic children 5
auth_param basic realm Web-Proxy
auth_param basic credentialsttl 1 minute
auth_param basic casesensitive off
acl db-auth proxy_auth REQUIRED
http_access allow db-auth
http_access allow localhost
#
# Recommended minimum Access Permission configuration:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost //仅允许本机主机进行缓存管理
http_access deny manager //拒绝其他主机的所有缓存管理
# Deny requests to certain unsafe ports
http_access deny !Safe_ports //拒绝所有非Safe_ports的连接，Safe_ports为配置文件中所定义的若干端口
# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports
# 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 //允许本地网段使用
http_access allow localhost
# And finally deny all other access to this proxy
#http_access deny all //拒绝所有
http_access allow all //允许所有
# Squid normally listens to port 3128
http_port 8089 //设置监听的IP与端口号
cache_mem 128 MB //内存缓存总容量，额外提供给squid使用的内存，squid的内存总占用为 X * 10+15+“cache_mem”，其中X为squid的cache占用的容量（以GB为单位），
//比如下面的cache大小是100M，即0.1GB，则内存总占用为0.1*10+15+64=80M，推荐大小为物理内存的1/3-1/2或更多。
maximum_object_size 4 MB //设置squid磁盘缓存最大文件，超过4M的文件不保存到硬盘
maximum_object_size_in_memory 4 MB //设置可以缓存的单个文件最大容量为4MB
https_port 443 cert=/usr/local/squid/etc/bpoj.crt key=/usr/local/squid/etc/bpoj.key
cache_log /var/log/squid/cache.log //设置缓存日志
access_log /var/log/squid/access.log//log //文件存放路径和日志格式
#access_log syslog squid
cache_dir ufs /var/log/squid/cache 200 16 512 read-only //定义squid的cache存放路径、cache目录容量（单位M）、一级缓存目录数量、二级缓存目录数量
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /usr/local/squid/var/cache/squid 100 16 256
# Leave coredumps in the first cache dir
coredump_dir /var/log/squid/core_dump
//percent为百分比，如果squid最后修改系数算法低于百分比则数据过期
# 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
# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ? //禁止缓存CGI脚本
# 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
#custom error
error_directory /etc/squid/pages/
============================================
[danny@ip-172-31-21-147 ~]$ cat /etc/squid/squid.conf
#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
# 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:
#
# Only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager
# 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
# 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
http_access allow all
# Squid normally listens to port 3128
#http_port 3128
#http_port 8089
#https_port 443 cert=/etc/squid/bpohz.crt key=/etc/squid/bpohz.key
https_port 443 cert=/etc/squid/qddl.crt key=/etc/squid/qddl.key
cache_mem 128 MB
maximum_object_size 4 MB
maximum_object_size_in_memory 4 MB
cache_log /var/log/squid/cache.log
cache_access_log /var/log/squid/access.log
cache_dir ufs /var/log/squid/cache 200 16 512 read-only
# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256
#access_log syslog squid
# 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
visible_hostname ip-172-31-21-147
auth_param basic program /usr/lib64/squid/squid_db_auth --user root --password ******@# --plaintext --persist
auth_param basic children 5
auth_param basic realm Web-Proxy
auth_param basic credentialsttl 1 minute
auth_param basic casesensitive off
acl db-auth proxy_auth REQUIRED
http_access allow db-auth
http_access allow localhost
http_access deny all