Loading... <p><strong>需求描述</strong></p> <p> <strong>使用iptables设置SNAT策略</strong></p> <p>  使192.168.100.0/24网段的主机通过NAT方式共享上网</p> <p> <strong>配置squid代理服务</strong></p> <p>  对HTTP访问进行缓存加速,并结合防火墙策略实现透明代理</p> <p><strong> 在代理服务中进行访问控制</strong></p> <p> 禁止局域网用户下载rmvb、mp3格式的文件</p> <p>  对超过3M大小的文件不做缓存,禁止下载超过8M的文件</p> <p>  禁止用户访问qq.com、tencent.com、xxxx.com等域的网站</p> <p>  启用网址过滤,禁止访问包含“sex”、“adult”字样的链接</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image27636.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-27636" border="0" alt="wps_clip_image-27636" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image27636_thumb.png" width="522" height="311" /></a></p> <p>1. 准备好客户机及Internet测试服务器,在测试服务器上启动httpd服务</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image21416.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-21416" border="0" alt="wps_clip_image-21416" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image21416_thumb.png" width="661" height="160" /></a></p> <p>2. Squid代理服务器上安装Squid</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image20566.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-20566" border="0" alt="wps_clip_image-20566" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image20566_thumb.png" width="663" height="109" /></a></p> <p>3. 开启路由转发和SNAT <br /><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image7642.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-7642" border="0" alt="wps_clip_image-7642" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image7642_thumb.png" width="418" height="94" /></a></p> <p>3. 配置透明代理支持、缓存和下载文件大小限制、网址过滤</p> <p>1. 修改squid.conf配置文件,并重新加载该配置</p> <p>http_port 192.168.1.1:3128 transparent  <br />##########################################</p> <p>http_port 192.168.100.254:3128 transparent</p> <p>acl all src 0/0</p> <p>http_access alow all</p> <p>reply_body_max_size 10240000 allow all</p> <p>access_log /var/log/squid/access.log squid</p> <p>##########################################</p> <p>2. 添加iptables规则</p> <p>iptables -t nat –A PREROUTING -i eth0 -s 192.168.100.0/24 -p tcp --dport 80 -j REDIRECT --to-ports 3128 <br /><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image3539.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-3539" border="0" alt="wps_clip_image-3539" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image3539_thumb.png" width="596" height="103" /></a></p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image2766.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-2766" border="0" alt="wps_clip_image-2766" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image2766_thumb.png" width="596" height="50" /></a></p> <p>3. 客户机浏览器(不需要在浏览器中指定代理服务器的地址、端口)</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image27094.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-27094" border="0" alt="wps_clip_image-27094" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image27094_thumb.png" width="419" height="317" /></a></p> <p>4. 在代理服务中进行访问控制</p> <p>#######################################</p> <p>http_port 192.168.100.254:3128 transparent</p> <p>acl all src 0/0</p> <p>http_access allow all</p> <p>maximum_object_size 3076 KB</p> <p>reply_body_max_size 81920000 allow all</p> <p>access_log /var/log/squid/access.log squid</p> <p>acl lan100 src 192.168.100.0/24</p> <p>acl denydomain dstdomain .qq.com .tencent.com .xxxx.com</p> <p>acl denywords urlpath_regex -i sex adult</p> <p>acl realfile urlpath_regex -i \.rmvb$ \.mp3$</p> <p>http_access deny lan100 denydomain</p> <p>http_access deny lan100 denywords</p> <p>http_access deny lan100 realfile</p> <p>##########################################</p> <p>5. 重置squid服务,测试!</p> <p> 禁止局域网用户下载rmvb、mp3格式的文件</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image21698.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-21698" border="0" alt="wps_clip_image-21698" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image21698_thumb.png" width="511" height="75" /></a></p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image7718.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-7718" border="0" alt="wps_clip_image-7718" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image7718_thumb.png" width="504" height="330" /></a></p> <p> 对超过3M大小的文件不做缓存,禁止下载超过8M的文件</p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image31987.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-31987" border="0" alt="wps_clip_image-31987" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image31987_thumb.png" width="505" height="82" /></a></p> <p><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image25425.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-25425" border="0" alt="wps_clip_image-25425" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image25425_thumb.png" width="498" height="376" /></a></p> <p> 禁止用户访问qq.com、tencent.com、xxxx.com等域的网站</p> <p> 启用网址过滤,禁止访问包含“sex”、“adult”字样的链接 <br /><a href="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image19672.png"><img style="border-bottom: 0px; border-left: 0px; display: inline; border-top: 0px; border-right: 0px" title="wps_clip_image-19672" border="0" alt="wps_clip_image-19672" src="https://www.crazycen.com/usr/uploads/2011/08/wps_clip_image19672_thumb.png" width="467" height="305" /></a></p> Last modification:October 6, 2023 © Allow specification reprint Support Appreciate the author AliPayWeChat Like 如果觉得我的文章对你有用,请随意赞赏