DNS enhancements

This feature includes enhancements to Junos OS domain name system (DNS) support, which allows you to use domain names as well as IP addresses to identify locations. Enhancements include: 

• DNS proxy: The device proxies hostname resolution requests on behalf of the clients behind the SRX firewall. 
• DNS proxy with split DNS: You can configure your proxy server to split the DNS query based on both the interface and the domain name. You can also configure a set of name servers and associate them with a given domain name. 
• Dynamic DNS (DDNS) client: Servers protected by the device remain accessible despite dynamic IP address changes.