root@master:/home/lihan/work/cluster# ls
nginx-1.8.0 nginx-1.8.0.tar.gz squid-3.4.13.tar.gz
2. 解壓源碼包
root@master:/home/lihan/work/cluster# tar zxvf squid-3.4.13.tar.gz
root@master:/home/lihan/work/cluster# ls
nginx-1.8.0 nginx-1.8.0.tar.gz squid-3.4.13 squid-3.4.13.tar.gz
3. 編譯安裝squid
root@master:/home/lihan/work/cluster# cd squid-3.4.13
root@master:/home/lihan/work/cluster/squid-3.4.13# ./configure
root@master:/home/lihan/work/cluster/squid-3.4.13# make
root@master:/home/lihan/work/cluster/squid-3.4.13# make install
4. 進去squid默認安裝目錄查看
root@master:/usr/local/squid# ls
bin etc libexec sbin share var
其中，squid可執行文件位於./sbin, 配置文件squid.conf位於./etc/
5. 修改三個文件夾的權限
# chmod 777 /usr/local/squid/var/logs/
# chmod 777 /usr/local/squid/var/cache/squid
# chmod 777 /var/log/squid
6. 修改配置文件/usr/local/squid/etc/squid.conf
<span style="font-family:Microsoft YaHei;"><span style="font-family:Microsoft YaHei;">#
# 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
# 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
#http_port 192.168.100.30:80 vhost
http_port 80 vhost
cache_peer 192.168.100.31 parent 80 0 originserver weight=5 max-conn=30
cache_peer 192.168.100.210 parent 80 0 originserver weight=5 max-conn=30
cache_mem 64 MB
maximum_object_size 4096 KB
access_log /var/log/squid/access.log
# 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 /usr/local/squid/var/cache/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</span></span>root@master:/usr/local/squid/sbin# ./squid -N -d1 #d1(1234的1非dl)
8. 測試
8.1 拓撲
如下圖所示，squid運行於s0服務器上面，其ip地址爲192.168.100.30 ，http端口號爲80. 其配置與/usr/local/squid/etc/squid.conf保持一致. squid對s1, s2進行代理：
圖1 拓撲
8.2 抓包
啓動服務器s0上的wireshark抓；啓動瀏覽器，瀏覽器所在的客戶端ip地址爲192.168.100.31，在瀏覽器地址欄中輸入http://192.168.100.30，不斷的刷新瀏覽器，報文如下：
圖2 抓包
可見，s0所在squid對192.168.100.31/210的服務器的靜態頁面進行了cache. (192.168.100.31對192.168.100.30進行了http請求，而192.168.100.30並未請求192.168.100.31/210, 而是直接回應了http響應).