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使用firewall-cmd限制ssh只能从指定IP段访问

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东方龙头 发表于 2020-12-31 20:25:41 | 显示全部楼层 |阅读模式 打印 上一主题 下一主题
使用firewall-cmd限制ssh只能从指定IP段访问

一、配景形貌
公司时常有linux(Centos7)服务器SSH服务袒露在外网(小公司未上硬件防火墙),通过lastb命令可以查到登录不定期有爆破登录记录!如此如果密码设置未到达强度要求,有被爆破乐成的几率。
为增强安全发起:
①、密码强度要有大小写英文字母加数字加特殊字符。
②、防火墙限制可ssh登岸服务器IP地点、或IP段。
  1. share    ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    oracle   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    admin    ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    root     ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    root     ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    ara      ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    root     ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    root     ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    user1    ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    huawei   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    oracle   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    zhangnan ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    docker   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    oracle   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    ara      ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    user1    ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    huawei   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    oracle   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    zhangnan ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    docker   ssh:notty    139.59.0.68      Sat Dec  5 08:35 - 08:35  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:56 - 15:56  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:56 - 15:56  (00:00)    root     ssh:notty    60.30.105.51     Fri Dec  4 15:55 - 15:55  (00:00)    root     ssh:notty    60.30.105.51     Fri Dec  4 15:53 - 15:53  (00:00)    root     ssh:notty    60.30.105.51     Fri Dec  4 15:52 - 15:52  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:51 - 15:51  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:51 - 15:51  (00:00)    root     ssh:notty    60.30.105.51     Fri Dec  4 15:50 - 15:50  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:49 - 15:49  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:49 - 15:49  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:47 - 15:47  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:47 - 15:47  (00:00)    git      ssh:notty    60.30.105.51     Fri Dec  4 15:46 - 15:46  (00:00)    git      ssh:notty    60.30.105.51     Fri Dec  4 15:46 - 15:46  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:45 - 15:45  (00:00)    test     ssh:notty    60.30.105.51     Fri Dec  4 15:45 - 15:45  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 22:05 - 22:05  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 22:05 - 22:05  (00:00)    ubuntu   ssh:notty    59.67.77.90      Thu Dec  3 22:04 - 22:04  (00:00)    ubuntu   ssh:notty    59.67.77.90      Thu Dec  3 22:04 - 22:04  (00:00)    root     ssh:notty    59.67.77.90      Thu Dec  3 22:02 - 22:02  (00:00)    test     ssh:notty    59.67.77.90      Thu Dec  3 22:01 - 22:01  (00:00)    test     ssh:notty    59.67.77.90      Thu Dec  3 22:01 - 22:01  (00:00)    richard  ssh:notty    59.67.77.90      Thu Dec  3 22:00 - 22:00  (00:00)    richard  ssh:notty    59.67.77.90      Thu Dec  3 22:00 - 22:00  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 21:59 - 21:59  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 21:59 - 21:59  (00:00)    root     ssh:notty    59.67.77.90      Thu Dec  3 21:58 - 21:58  (00:00)    root     ssh:notty    59.67.77.90      Thu Dec  3 21:56 - 21:56  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 21:55 - 21:55  (00:00)    admin    ssh:notty    59.67.77.90      Thu Dec  3 21:55 - 21:55  (00:00)    write    ssh:notty    59.67.77.90      Thu Dec  3 21:54 - 21:54  (00:00)    write    ssh:notty    59.67.77.90      Thu Dec  3 21:54 - 21:54  (00:00)
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二、通过firewall-cmd防火墙限制可通过SSH访问服务器的IP
如下:
仅允许 192.168.1.0网段、及118.123.31.41的IP地点可以访问服务器51022(SSH)端口!
  1. firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="192.168.1.0/24" port protocol="tcp" port="51022" accept'firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="118.123.31.41" port protocol="tcp" port="51022" accept'firewall-cmd --permanent --remove-port=51022/tcpfirewall-cmd --reloadfirewall-cmd --list-all
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三、记录到登录泉源IP及用户名(可参考)
记录到的泉源IP地点有如下:
  1. 104.131.43.102104.236.58.123118.113.15.13132.255.7.2138.68.95.63139.59.0.68142.93.65.72157.230.252.35157.245.16.168159.65.123.109159.65.253.235165.22.230.85165.227.94.27167.172.44.167173.249.30.84178.128.173.100185.170.76.118188.166.12.249188.166.223.116188.166.69.54192.241.135.131192.241.189.85210.30.96.138211.221.239.200216.244.221.235220.166.180.16837.59.43.21646.101.220.13447.75.42.22647.94.159.16851.161.119.9859.67.77.9060.30.105.5167.205.154.16585.190.240.19789.144.47.28
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实验登录的用户名
  1. 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来源:https://blog.csdn.net/xjjj064/article/details/111993606
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