To add the ability for the user to manually enter a DNS entry in OpenDNS for their own use (like what is done in a hosts file on a computer to add a manual DNS entry). this would allow user specific DNS resolution for each user.
Some use case scenarios:
1- Some ISPs have their own websites (like portals to check usage) that have their addresses mapped through their own DNS servers and resolve to an ISP specific IP address. When changing the default ISP DNS server to OpenDNS, those sites are no longer accessible except through their IP addresses.
2- When using a home server behind a NAT firewall/router, it would be useful for the user to manually add an entry for the private IP of the server so they access it with with the same name they use from outside the house but connect to it via its private IP address, which makes data transfers much faster, instead of going through the public IP and the NAT. (eg. ownCloud server).
3- Creating an easy to remember domain for an IP that is used much but not registered on public/dynamic DNS. (eg. router.com would direct to 192.168.1.1, or printer would redirect to 192.168.1.50)
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