This whitepaper is for historical reference only. Some content might be outdated and some links might not be available.

# Network connectivity
<a name="network-connectivity"></a>

Connectivity from the Amazon WorkSpaces VPC to the associated Active Directory Domain Controllers to be used for authentication and authorization is required across a number of ports and protocols. This connectivity must be established before Amazon WorkSpaces can be successfully deployed. 

![A diagram depicting VPC peering](http://docs.aws.amazon.com/whitepapers/latest/access-workspaces-with-access-cards/images/workspaces-smartcard4.png)


* VPC peering *