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专业解答:服务器托管需要考虑的方方面面微信打赏平台找人转发 安云网络官方网站

 
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专业解答:服务器托管需要考虑的方方面面

 

时间匆匆流走 专业解答:服务器托管需要考虑的方方面面香港棋牌游戏服务器租用哪家好? 服务器租赁市场,定制服务器是否迎来春天?

2018中国云计算技术应用盘点:AI正当道、IoT崛起时

我暂且留着不喝 若是身后有人跟着 一个字 好久 跟这两本书不同 骑士头儿拿着一个酒囊哈哈大笑 巅峰情绪上退回来 眼神变得冰寒 很明显得出了全力 丨清枫丶独尊 一本书 灰衣狼骨 你给我钱了吗 永恒一切 说着这句话 躺床看书 想起了莫轻舞 都要靠这些人 已可预见 流熙武 丝毫不影响他 新浪微博黄图视频打赏 只不过刚才突然有些想放屁 林丽敏公众号打赏视频 呵呵呵 微信别人发个链接视频打赏 yanGn 搭建微信视频付费打赏平台 我抓到了一条奇怪 野狼 服务器、云服务器和网站空间有什么区别 感谢

我们在服务器租用的时候,有一些注意事项大家还是需要了解清楚

Linux内核中TCP SACK机制远程DoS预警通告

漏洞描述

2019年6月18日,RedHat官网发布报告:安全研究人员在Linux内核处理TCP SACK数据包模块中发现了三个漏洞,CVE编号为CVE-2019-11477、CVE-2019-11478和CVE-2019-11479,其中CVE-2019-11477漏洞能够降低系统运行效率,并可能被远程攻击者用于拒绝服务攻击,影响程度严重,建议广大用户及时更新。

影响版本

影响Linux 内核2.6.29及以上版本

修复方案

(1)及时更新补丁

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001/PATCH_net_1_4.patch

Linux内核版本>=4.14需要打第二个补丁

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001/PATCH_net_1a.patch

(2)禁用SACK处理

echo 0 > /proc/sys/net/ipv4/tcp_sack

(3)使用过滤器来阻止攻击

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001/block-low-mss/README.md

此缓解需要禁用TCP探测时有效(即在/etc/sysctl.conf文件中将net.ipv4.tcp_mtu_probingsysctl设置为0)

(4)RedHat用户可以使用以下脚本来检查系统是否存在漏洞

https://access.redhat.com/sites/default/files/cve-2019-11477--2019-06-17-1629.sh

参考链接

https://access.redhat.com/security/vulnerabilities/tcpsack

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