发布时间:2015-12-21 14:37:39
confirm / renew / rebind 区别0.交互过程confirm报文1. confirm 报文 1) 在链路发送变化的情况下触发 2) A client sends a Confirm message to any available server to determine whether the addresses it was assigned are still appropriate to the link.........【阅读全文】
发布时间:2015-11-28 16:10:24
DNS服务器,linux下一般用bind,但bind太复杂了,dnsmasq使用上比dns始祖bind要简便得多,可以做正向dns代理,也可以直接做内部纯dns服务器用。默认配置下,dnsmasq使用系统的/etc/resolv.conf并读取/etc/hosts, /etc/resolv.conf文件是用来配置上一级DNS /etc/hosts文件是用来存储dns代理缓存。 dnsmasq可以.........【阅读全文】
发布时间:2015-11-28 16:06:18
Cloud security vendor Zscaler has made a name for itself as a proxy that enterprises can use to filter traffic and provide security. The company is now augmenting its strategy with a new service that leverages DNS redirection, in a bid to minimize the amount of traffic that is sent up to the c.........【阅读全文】
发布时间:2015-10-20 15:24:44
下面的这张图(http://www.openwall.com/presentations/IPv6/img35.html)很好的说明了DAD的整个过程。linux内核2.6.32的DAD检测函数为addrconf_dad_start,调用该函数后的第一步就是1.调用函数addrconf_join_solict将接口加入solicited-note组播组中(上图中的第2步)2.addrconf_dad_timer--->ndisc_send_ns发送NS报文(上.........【阅读全文】