配置squid，实现正向代理
环境：CentOS 6.5
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代理主机ip：192.168.3.224，10.0.0.10
内网主机ip：10.0.0.11
安装前准备
1、关闭selinux
[root@php-proxy ~]# setenforce 0 [root@php-proxy ~]# getenforce permissive [root@php-proxy ~]# vim /etc/selinux/config SELINUX=disabled
2、关闭防火墙filter表，设置防火墙端口转发规则
[root@php-proxy ~]# iptables -t filter -F [root@php-proxy ~]# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE [root@php-proxy ~]# service iptables save
3、修改主机路由模式
[root@php-proxy ~]# vim /etc/sysctl.conf net.ipv4.ip_forward = 1
编译安装squid
1、安装squid
http://www.squid-cache.org/Versions/v3/3.2/squid-3.2.3.tar.gz
[root@php-proxy ~]# tar xf squid-3.2.3.tar.gz [root@php-proxy ~]# cd squid-3.2.3 [root@php-proxy ~]# ./configure --prefix=/usr/local/squid --enable-dlmalloc --enable-gnuregex --disable-carp --enable-async-io=100 --with-aufs-threads=32 --with-pthreads --enable-storeio="ufs,aufs" --enable-removal-policies="heap,lru" --enable-icmp --enable-htcp --enable-delay-pools --enable-useragent-log --enable-referer-log --disable-wccp --disable-wccpv2 --enable-kill-parent-hack --enable-arp-acl --disable-snmp --enable-default-err-language=Simplify_Chinese --enable-err-languages="Simplify_Chinese English" --disable-poll --disable-select --enable-epoll --enable-auth --enable-auth-basic="DB,NCSA,PAM,RADIUS,SASL" --with-aio --disable-ident-lookups --enable-truncate --enable-stacktraces --with-maxfd=65535 --disable-ipv6 --enable-ipf-transparent --enable-linux-netfilter
2、配置squid
[root@php-proxy ~]# mkdir -p /data/squid/{cache,coredump,logs}
[root@php-proxy ~]# /usr/sbin/groupadd squid
[root@php-proxy ~]# /usr/sbin/useradd squid -g squid -s /sbin/nologin
[root@php-proxy ~]# chmod -R 777 /data/squid/{cache,coredump,logs}
[root@php-proxy ~]# chown -R squid.squid /data/squid/{cache,coredump,logs}3、配置文件内容
[root@php-proxy ~]# vim /usr/local/squid/etc/squid.conf http_port 10.0.0.10:1080 cache_effective_user squid cache_effective_group squid cache_mem 2048 MB cache_swap_low 90 cache_swap_high 95 ipcache_size 1024 ipcache_low 90 ipcache_high 95 cache_replacement_policy lru memory_replacement_policy lru cache_dir aufs /data/squid/cache 20480 16 256 coredump_dir /data/squid/coredump memory_pools_limit 1024 MB max_open_disk_fds 0 minimum_object_size 0 KB maximum_object_size 32768 KB maximum_object_size_in_memory 2048 KB access_log /dev/null cache_access_log none cache_log /dev/null cache_store_log none cache_swap_log /data/squid/logs/swap.log logfile_rotate 1 pid_filename /usr/local/squid/var/logs/squid.pid cache_mgr lovezym5@126.com strip_query_terms off visible_hostname ProxySrv error_directory /usr/local/squid/share/errors/zh-cn request_header_max_size 64 KB request_body_max_size 0 KB negative_ttl 5 minutes read_timeout 1 minutes client_lifetime 10 minutes connect_timeout 1 minute peer_connect_timeout 30 seconds request_timeout 2 minutes persistent_request_timeout 1 minute client_persistent_connections off server_persistent_connections on tcp_recv_bufsize 65535 bytes half_closed_clients off httpd_suppress_version_string off ie_refresh off allow_underscore on 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 DNS_nameservers DNS服务器IP acl OverConnLimit maxconn 300 http_access deny OverConnLimit acl our_network src 192.168.0.0/16 http_access allow our_network acl SSL_ports port 443 acl CONNECT method CONNECT http_access deny CONNECT !SSL_ports request_header_access Via deny all request_header_access X-Forwarded-For deny all
#检查配置是否正确 [root@php-proxy ~]# /usr/local/squid/sbin/squid -k parse #初始化cache缓存目录 [root@php-proxy ~]# /usr/local/squid/sbin/squid -z
4、配置启动脚本
[root@php-proxy ~]# vim /etc/init.d/squid
#!/bin/sh
#
#squid - this script start and stop the squid daemon
#
# chkconfig: - 90 25
# description: squid is a pagecache reverse proxy.
# processname: squid
# pidfile: /usr/local/squid/var/logs/squid.pid
# config: /usr/local/squid/etc/squid.conf
#
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
BINFILE="/usr/local/squid/sbin/squid"
CFGFILE="/usr/local/squid/etc/squid.conf"
PIDFILE="/usr/local/squid/var/logs/squid.pid"
LOCKFILE="/var/lock/squid.lock"
CACHEPATH="/data/squid/cache"
OUTFILE="/data/squid/logs/squid.out"
SQUID_PIDFILE_TIMEOUT=${SQUID_PIDFILE_TIMEOUT:-20}
SQUID_SHUTDOWN_TIMEOUT=${SQUID_SHUTDOWN_TIMEOUT:-100}
[[ -f $BINFILE ]] && SQUID="${BINFILE}"
CACHE_SWAP=`sed -e 's/#.*//g' ${CFGFILE} | grep cache_dir | awk '{print $3}'`
[ -z "$CACHE_SWAP" ] && CACHE_SWAP="${CACHEPATH}"
RETVAL=0
start() {
if [[ ! -f ${CFGFILE} ]]; then
echo "The configuration file: ${CFGFILE} has no found!" 1>&2
exit 6
fi
SQUID_OPTS="-s -f ${CFGFILE}"
[[ -z "$SQUID" ]] && echo "Insufficient privilege" 1>&2 && exit 4
for adir in $CACHE_SWAP
do
if [[ ! -d $adir/00 ]]; then
echo -n "init_cache_dir $adir"
$SQUID -z -F -D >> ${OUTFILE} 2>&1
fi
done
echo -n "Starting squid..."
$SQUID $SQUID_OPTS >> ${OUTFILE} 2>&1
RETVAL=$?
if [[ $RETVAL -eq 0 ]]; then
timeout=0;
while :
do
[[ ! -f ${PIDFILE} ]] || break
[[ $timeout -ge $SQUID_PIDFILE_TIMEOUT ]] && RETVAL=1 && break
sleep 1 && echo -n "."
timeout=$((timeout+1))
done
fi
echo ""
[[ $RETVAL -eq 0 ]] && touch ${LOCKFILE}
[[ $RETVAL -eq 0 ]] && echo "start squid is ok!"
[[ $RETVAL -ne 0 ]] && echo "start squid is failed!"
return $RETVAL
}
stop() {
SQUID_SHUTDOWN_TIMEOUT=${SQUID_SHUTDOWN_TIMEOUT:-100}
echo -n "Stopping squid..."
$SQUID -k check >> ${OUTFILE} 2>&1
RETVAL=$?
if [[ $RETVAL -eq 0 ]]; then
$SQUID -k shutdown &
rm -f ${LOCKFILE}
timeout=0
while :
do
[[ -f ${PIDFILE} ]] || break
[[ $timeout -ge $SQUID_SHUTDOWN_TIMEOUT ]] && echo "" && return 1
sleep 2 && echo -n "."
timeout=$((timeout+2))
done
echo ""
echo "Stop squid is ok!"
else
echo ""
echo "Stop squid is failed!"
[[ ! -e ${LOCKFILE} ]] && RETVAL=0
fi
return $RETVAL
}
restart() {
stop
sleep 1
start
}
case "$1" in
start)
start
;;
stop)
stop
;;
reload)
SQUID_OPTS=${SQUID_OPTS:-"-D"}
$SQUID -k reconfigure -f ${CFGFILE}
;;
restart)
restart
;;
condrestart)
[[ -e ${LOCKFILE} ]] && restart || :
;;
*)
echo $"Usage: $0 {start|stop|reload|restart|condrestart}"
exit 2
esac
exit $?[root@php-proxy ~]# chmod +x /etc/init.d/squid #添加执行权限 [root@php-proxy ~]# service squid start #启动服务
3、配置主机ip地址
代理主机内网ip
[root@php-proxy ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0:0 DEVICE=eth0:0 TYPE=Ethernet ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=none IPADDR=10.0.0.10 NETMASK=255.0.0.0
内网主机ip地址
[root@php ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=52:54:00:B1:B4:99 TYPE=Ethernet UUID=4dd9081e-2cf6-4f81-bde4-561d3877267e ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=static IPADDR=10.0.0.11 NETMASK=255.0.0.0 GATEWAY=10.0.0.10 DNS1=8.8.8.8 DNS2=8.8.4.4
内网主机测试可行：
[root@php ~]# curl -I www.qq.com HTTP/1.1 200 OK Server: squid/3.4.3 Date: Wed, 13 Jul 2016 06:01:36 GMT Content-Type: text/html; charset=GB2312 Connection: keep-alive Vary: Accept-Encoding Vary: Accept-Encoding Expires: Wed, 13 Jul 2016 06:02:36 GMT Cache-Control: max-age=60 Vary: Accept-Encoding Access-Control-Allow-Origin: http://bz.qq.com X-Cache: HIT from nanjing.qq.com
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