centos 使用 pptdp 创建了 vpn,请问怎样禁止连上该 vpn 的用户访问 baidu.com?先谢谢了 - V2EX
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vibrance

centos 使用 pptdp 创建了 vpn,请问怎样禁止连上该 vpn 的用户访问 baidu.com?先谢谢了

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  •   vibrance Jan 19, 2016 3012 views
    This topic created in 3753 days ago, the information mentioned may be changed or developed.
    13 replies    2016-01-19 14:54:44 +08:00
    ryd994
        1
    ryd994  
       Jan 19, 2016 via Android
    iptables -I FORWARD -d 百度 IP 段 -j REJECT

    复杂一点可以做 squid 劫持,劫持下来以后当然想干什么干什么了,还可以缓存,参考国内小运营商
    xiaodaigou
        2
    xiaodaigou  
       Jan 19, 2016
    好!抵制百度!!!
    iptables -I OUTPUT -p tcp --dport 80 -m string --string "baidu.com" --algo kmp -j DROP
    gtalk
        3
    gtalk  
       Jan 19, 2016
    蛤蛤蛤~
    Devin
        4
    Devin  
       Jan 19, 2016 via iPhone
    @xiaodaigou 好厉害, iptables 的高级用法。。。顺便问下,改 hosts 文件不行吗
    ryd994
        5
    ryd994  
       Jan 19, 2016 via Android   1
    @xiaodaigou 你这样,引用了百度资源的站会很惨吧,不过有 gzip 不一定有事
    @Devin 这个问题问的好。不行
    但是你可以考虑劫持 DNS ,并对 DNS 进行过滤

    看看国内小 ISP 怎么做,都一样的
    nbndco
        6
    nbndco  
       Jan 19, 2016
    @xiaodaigou 这样所有连喷 baidu.com 的网站都上不去了
    ryd994
        7
    ryd994  
       Jan 19, 2016 via Android
    @xiaodaigou 按这个思路其实可以用 string 去 match DNS 包啊,性能更好
    -p udp --dport 53 -m string --string baidu.com -j DROP
    ryd994
        8
    ryd994  
       Jan 19, 2016 via Android
    @nbndco 网页内容有 gzip ,一般没事
    tobyxdd
        9
    tobyxdd  
       Jan 19, 2016
    DNS 污染+尽可能屏蔽所有百度 IP 吧
    vibrance
        11
    vibrance  
    OP
       Jan 19, 2016
    @xiaodaigou putty 执行这个后也 save 后重启防火墙,还是可以打开哦
    vibrance
        12
    vibrance  
    OP
       Jan 19, 2016   1
    @Devin 改 hotos 只对在转 centos 本地有效,现在需要的是连该 vpn 的用户打不开百度
    xiaodaigou
        13
    xiaodaigou  
       Jan 19, 2016
    @vibrance 缓存?
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