一.业务需求

公司线下业务的需要访问某个业务网站，但是公司的互联网出口IP地址为对端安全设备封堵，为规避此问题，在阿里云搭建反向代理服务器，通过反向代理转发到目标业务，解决不能访问的问题。

二.处理方式

1.在阿里云申请购买ECS虚拟机

2.在阿里云购买弹性公网IP地址，并绑定到ECS主机，也可以使用nat网关或者负载均衡SLB端口映射的方式，实现通过公网地址访问到ECS的代理软件的监听端口。

3.ECS虚拟机上安装haproxy代理软件，使用tcp或者http模式反向代理。

具体的haproxy的配置文件如下：

#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 30000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
#frontend  main *:5000
#    acl url_static       path_beg       -i /static /images /javascript /stylesheets
#    acl url_static       path_end       -i .jpg .gif .png .css .js

#    use_backend static          if url_static
#    default_backend             app

#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
#backend static
#    balance     roundrobin
#    server      static 127.0.0.1:4331 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
#backend app
#    balance     roundrobin
#    server  app1 127.0.0.1:5001 check
#    server  app2 127.0.0.1:5002 check
#    server  app3 127.0.0.1:5003 check
#    server  app4 127.0.0.1:5004 check
listen fpsquid01
    bind *:9999
    mode tcp
balance leastconn
    server web01 tysl.henan.chinatax.gov.cn:443 check inter 500 rise 1 fall 2

4.公司线下业务的软件配置阿里云代理的公网地址和端口