2018.11.26-2018.12.2

1. 简述常见加密算法及常见加密算法原理，最好使用图例解说 

 2、搭建apache或者nginx并使用自签证书实现https访问，自签名证书的域名自拟 

3、简述DNS服务器原理，并搭建主-辅服务器 

4、搭建并实现智能DNS

#####两台主机：172.16.100.141   做为DNS服务器 转发器 #####172.16.100.143   ******172.16.100.141****** ~]#vim /etc/named.conf acl sh { 172.16.100.141; }; acl bj { 172.16.100.143; }; options {    allow-query { any ;}; }    view “View_sh” {   match-clients { sh; };   zone “gaorui1.com” IN {         type master;         file “gaorui.com-sh.zone”;         allow-update { none; }; } view “View_bj” { match-clients { bj; };   zone “gaorui1.com” IN {         type master;         file “gaorui1.com-bj.zone”;         allow-update { none; }; } ~]#vim /var/named/gaorui1.com-sh.zone   $ORIGIN gaorui1.com. $TTL 3600 @  IN   SOA  ns1.gaorui1.com. admin.gaorui1.com. {   20181130   10m   5m   1D   2D }      IN  NS  ns1 ns1  IN   A   172.16.100.141 www IN   A   172.16.100.1 ~]#vim /var/named/gaorui1.com-bj.zone $ORIGIN gaorui1.com. $TTL 3600 @  IN   SOA  ns1.gaorui1.com. admin.gaorui1.com. {   20181130   10m   5m   1D   2D }      IN  NS  ns1 ns1  IN   A   172.16.100.141 www IN   A   172.16.100.2 ~]#dig -t A www.gaorui1.com @172.16.100.141 www.gaorui1.com. 3600 IN A 172.16.100.2 ******172.16.100.143****** ~]#vim /etc/named.rfc1912.zones zone “gaorui1.com” IN {   type forward;   forward only;   forwarders { 172.16.100.141; } }; ~]#dig -t A www.gaorui1.com @172.16.100.141 www.gaorui1.com. 3600 IN A 172.16.100.1