NAT - Notes

Consider that you always translate sources (there are exceptions, but forget about them for now) then most of the times when you have to translate a destination IP or port, look at the problem from the opposite direction:

• if you have to change the destination IP and/or port when going from inside to outside, then use ip nat outside source ...
• if you have to change the destination IP and/or port when going from outside to inside, then use ip nat inside source ...

Difference between static-routes with next-hop as exit-interface or next-hop as ip-address

https://supportforums.cisco.com/document/116711/static-routes-next-hop-exit-interface-or-ip-address

Install and Configure DNS in Windows Server 2012

•  Once you have access to windows server 2012, on the home screen search    for "Server Manager" as depicted below.      

•       Open Server Manager

•        Click on "Manage" and choose "Add roles and Features"

•        Choose "Role based or feature-based installation". Click on Next

•       On Server Roles select "DNS Server" and click on Next

•        Click on Next on all other installation steps by which the installation will start.

•        Once the DNS Server is installed, your Dashboard will depict DNS.

•     Click on Tools  and then click on DNS so that DNS Manager will be launched

•     Below is how a default DNS Manager configuration will look like

•     Now you can add an Authoritative Zone on this DNS Server. You can also add delegation which in our case is "gslb".

•  Click on "Action" and then click on "New Zone". Click on Next. Then click on "Primary   Zone" and then select "Forward Lookup Zone". Mention the Zone Name , Don't allow    Dynamic Updates and then click on Next and Finish.

•      Conditional Forwarders [to access resources in some other authoritative domain] and Global Forwarders [To access resources hosted in internet] can be added as suggested below.