Cisco DNS view

在配置vpn的路由器上，通过设置网关为dns，实现内外网dns解析分流

ip dhcp pool data
network 192.168.1.0 255.255.255.0
default-router 192.168.1.1
dns-server 192.168.1.1
!
!
ip name-server 114.114.114.114    --定义外网dns server
ip name-server 172.16.186.17       --- 定义内网dns server
ip name-server 172.29.12.25

!
ip domain lookup
ip dns view eascs                       ----定义dns view关联内网dns
dns forwarder 172.16.186.17
dns forwarder 172.29.12.25
ip dns view default                      ----定义dns默认view关联外网dns
dns forwarder 114.114.114.114

!
ip dns view-list primary            
view eascs 10
restrict name-group 1       ---匹配name-list 1的直接用view eascs解析
view default

!
ip dns name-list 1 permit .*.EASCS.COM    ----用正则表达式来定义域名后缀
ip dns server view-group primary
ip dns server