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代理服务器（一机多IP）配置
环境：CentOS6.5 64位 8核8G内存
主IP：183.211.57.240 （255.255.255.0 gw:183.211.57.1）
绑定IP：183.211.57.（151-161，163-181）
配置过程：
一、先配绑定IP
[root@localhost network-scripts]# ll
total 224
-rw-r--r--. 1 root root 276 Apr 6 08:09 ifcfg-eth0
-rw-r--r--. 1 root root 133 Apr 6 09:00 ifcfg-eth0-range0
-rw-r--r--. 1 root root 134 Apr 6 09:09 ifcfg-eth0-range1
#vim ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=3cb23812-d5e2-4ee6-be48-94358d54588d
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
HWADDR=00:15:17:74:D8:E6
IPADDR=183.211.57.240
PREFIX=24
GATEWAY=183.211.57.1
DNS1=202.96.134.133
DEFROUTE=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
#vim ifcfg-eth0-range0
DEVICE=eth0
BOOTPROTO=static
IPADDR_START=183.211.57.151
IPADDR_END=183.211.57.161
CLONENUM_START=3 #表示eth0:3 开始，这个无所谓，但不要跟后面的重复就行，把IP数数出来。
NETMASK=255.255.255.0
ONBOOT=yes
#vim ifcfg-eth0-range1
DEVICE=eth0
BOOTPROTO=static
IPADDR_START=183.211.57.163
IPADDR_END=183.211.57.181
CLONENUM_START=20 #我这里就是空出了10多个IP，跟上面的别重叠
NETMASK=255.255.255.0
ONBOOT=yes
然后 #service network restart 就可以了。
二、安装并配置squid
在服务器上执行：#yum -y install squid
重点在配置文件：(下面我只是用4个IP举例，按实际全都列进去就行了)
#vim /etc/squid.conf
#
# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 183.61.251.150/32
#acl localhost src 216.18.158.203/32 ::1
#acl to_localhost dst 183.211.57.2/22 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 157.16.0.0/12 # 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
acl ip_allow src 183.211.57.0/24
acl cloud_1 myip 183.211.57.151
acl cloud_2 myip 183.211.57.152
acl cloud_3 myip 183.211.57.153
acl cloud_4 myip 183.211.57.154
.
.
.
http_access allow ip_allow
http_access allow all
http_access allow cloud_1
http_access allow cloud_2
http_access allow cloud_3
http_access allow cloud_4
.
.
.
tcp_outgoing_address 183.211.57.151 cloud_1
tcp_outgoing_address 183.211.57.152 cloud_2
tcp_outgoing_address 183.211.57.153 cloud_3
tcp_outgoing_address 183.211.57.154 cloud_4
.
.
.
icp_access allow all
forwarded_for off
request_header_access X-Forwarded-For deny all
request_header_access Via deny all
request_header_access All allow all
# 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
# Squid normally listens to port 3128
http_port 25283
# 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
# 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
acl OverConnLimit maxconn 8000
IPTABLES 防火墙配置：
[root@localhost network-scripts]# cat /etc/sysconfig/iptables
# Generated by iptables-save v1.4.7 on Thu Apr 6 09:46:04 2017
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [75:8727]
-A INPUT -p tcp -m tcp --dport 2222 -j ACCEPT
# -A INPUT -p tcp -m tcp --dport 25283 -j ACCEPT
-A INPUT -s 122.129.32.0/24 -p tcp -m tcp --dport 25283 -j ACCEPT
-A INPUT -s 183.60.150.0/24 -p tcp -m tcp --dport 25283 -j ACCEPT
-A INPUT -s 211.17.158.203/32 -p tcp -m tcp --dport 25283 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 5666 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT
# Completed on Thu Apr 6 09:46:04 2017
代理服务器（一机多IP）配置