Room Domain Join User Guide

Tehama offers a Domain Join feature for Tehama Gateway Rooms. This feature allows an organization to create a Gateway Room that has their network's domain joined to the Room, giving read-only access to the domain's objects, such as users and policies, to the Room.

The benefits of the Domain Join feature are:

  • The Room's members' Tehama login usernames (email addresses) are used as the login usernames for the desktops in the Room to which they are assigned.

  • Any policies found in the Room's organization's network domain will be applied automatically to the desktops in the Room.

DISCLAIMER: The Room Domain Join (Beta) feature is still undergoing development and is provided 'as-is', without any warranties or support, and Tehama will not be liable for any loss of data.

Domain Join Room Requirements and Limitations


  • You must have a Tehama organization.

  • You must have a network environment established.

  • You must be willing to run a Tehama Gateway connected to your Room from inside this network.

  • You must be willing to open your network's firewall (if you have one set up) to allow communication with the Tehama Gateway and with Tehama's Domain Join components for your Tehama Room.

  • This network environment must have a domain running in it.

  • Your network domain must not set any password rotation policies for the service and admin accounts.

  • Your network domain must use private addresses as defined by RFC 1918:
    RFC 1918 defines the following address ranges as private,
    • (addresses through inclusive)
    • (addresses through inclusive)
    • (addresses through inclusive)

  • You must be willing to share your network domain's credentials with Tehama.

  • The members in your Tehama organization, at least the ones you plan to add to your Room with domain join, must use their username (email address) from your network's domain as their Tehama username.


  • Tehama Rooms with Domain Join enabled are limited to desktops of type "Tehama Windows" only.

  • Members of Tehama Rooms with Domain Join enabled must connect to their desktops through the 'Connecting with credentials' methodology, using the Teradici PCoIP Client. (The automatic connect sequence provided by the Tehama Client is not supported.)

Steps to enable a Domain Join Room

Note: These steps only require action from your organization, but Tehama Support is available to offer assistance.

Create and connect a "Domain Join" Tehama Room. This will give you a Room with network access mode set to Tehama Gateway, with your organization as both the Room's owner organization and its connected organization (owner+connected) and a default Desktop type of 'Tehama Windows'. You will not be allowed to invite any other organizations into the Room.


A. Follow the instructions in the Create and connect a Domain Join Room section of the Getting Started with Tehama Installation guide, taking special note of these steps.

  1. Step 4 - Select Domain Join Room:
    Be sure to select the Domain Join Room option here. This leads you on the correct pathway for creating and connecting a Domain Join Room.

  2. Step 12 - Establish a Gateway Connection:
    Install a Tehama Gateway in your network, and open your network firewall to allow communication from the Tehama Room with your Gateway and with your network's Domain Controller(s).

    As documented in this step, follow the gateway installation instructions in the Tehama Gateway User Guide. There are three methods of installation: install from an AWS AMI, install from an automated-script and install using Docker. Select the method best suited to your circumstances.

    A common step in each installation method is to configure your network firewall (assuming your network has a firewall) so the Tehama Gateway instance you are installing can adequately communicate with your Tehama Room.

    In Domain Join Rooms, you must also open access in your network's Domain Controller(s) (DC) to a predefined set of ports, so that the Domain Join components in your Tehama Room can communicate with your DC(s) (via the Gateway). See the list of ports in section Ports to open for Room to DC communication.

    IMPORTANT Verify that the Tehama Gateway successfully connects to the Room. The Room status on the Room's STATUS page should be Connected (green).

  3. Steps 14, 15 and 16 - Connect to Domain:
    Connect your network's domain to the Room. You will need to enter your network domain credentials:
    • Domain name e.g.:
    • Search base e.g.: DN=Users,DC=onprem,DC=com
    • Admin account name e.g.: myadminuser
    • Admin account password e.g.: adminpassw0rd
    • Service account name e.g.: myserviceuser
    • Service account password e.g.: servicepassw0rd

      Note: You will not be able to perform any Room administration, such as adding members or creating/assigning Desktop templates, while you are waiting for the Room to connect to your domain.

B. Set up firewall rules in your Tehama Room, as desired. (These rules control what can be accessed through the internet from your Room's desktops.)

Follow the instructions for how to add custom firewall rules to your Tehama Room in the Add Custom Rule section of the Firewall Rules User Guide.

Verify that the Room's firewall rules work as expected. Follow the instructions for how to test a connection with Tehama's Connection Test Tool in the Connection Test Tool User Guide.

C. Now your Domain Join Room is ready to be used. Proceed to add members to your Room and to create Desktops for them.

Follow the instructions for how to add members to your Tehama Room in the Add Room access for users/teams section of the Room Membership User Guide.

Follow the instructions for how to create Desktops in your Tehama Room in the Add a Desktop template section of the Desktops User Guide.

Ports to open for Room to DC communication

If the network your Domain Join Room is connected to has a firewall, open access in your network's Domain Controller(s) (DC) to the following ports so that the Domain Join components in your Tehama Room can communicate with your DC(s) (via the Gateway).

Service Port Protocol
DNS 53 tcp/udp
Kerberos 88 tcp/udp
ntp 123 udp
Endpoint Mapper (DCE/RPC Locator Service) 135 tcp
NetBIOS Name Service 137 udp
NetBIOS Datagram 138 udp
NetBIOS Session 139 tcp
LDAP 389 tcp/udp
SMB over TCP 445 tcp
Kerberos kpasswd 464 tcp/udp
LDAPS 636 tcp
Global Catalog 3268 tcp
Global Catalog SSL 3269 tcp
Dynamic RPC Ports 49152-65535 tcp

Maintenance of a Domain Join Room

  • IMPORTANT: Refrain from deleting/archiving your room without the assistance of Tehama Support.
    This is to ensure that all domain join artifacts are removed from your network when your Room is removed. Tehama Support will ask you to keep your Room's Tehama Gateway running while they perform the necessary domain join deactivation steps.

  • Only invite members to the Room who are members of your network domain.
    Unless a member is part of your domain, any Desktops assigned to them will be unable to authenticate them.

  • Keep your Tehama Gateway running and up-to-date.
    Domain Join requires that a Tehama Gateway be running in your network, in order to access your domain.