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Samba HowTo Guide
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Interdomain Trusts

Interdomain trust relationships form the primary mechanism by which users from one domain can be granted access rights and privileges in another domain.

To discover what trust relationships are in effect, execute this command:

root#  net rpc trustdom list -Uroot%not24get
Trusted domains list:

none

Trusting domains list:

none

There are no interdomain trusts at this time; the following steps will create them.

It is necessary to create a trust account in the local domain. A domain controller in a second domain can create a trusted connection with this account. That means that the foreign domain is being trusted to access resources in the local domain. This command creates the local trust account:

root#  net rpc trustdom add DAMNATION f00db4r -Uroot%not24get

The account can be revealed by using the pdbedit as shown here:

root#  pdbedit -Lw DAMNATION\$
DAMNATION$:1016:9AC1F121DF897688AAD3B435B51404EE: \
7F845808B91BB9F7FEF44B247D9DC9A6:[I         ]:LCT-428934B1:

A trust account will always have an I in the field within the square brackets.

If the trusting domain is not capable of being reached, the following command will fail:

root#  net rpc trustdom list -Uroot%not24get
Trusted domains list:

none

Trusting domains list:

DAMNATION           S-1-5-21-1385457007-882775198-1210191635

The above command executed successfully; a failure is indicated when the following response is obtained:

net rpc trustdom list -Uroot%not24get
Trusted domains list:

DAMNATION           S-1-5-21-1385457007-882775198-1210191635

Trusting domains list:

DAMNATION           domain controller is not responding

Where a trust account has been created on a foreign domain, Samba is able to establish the trust (connect with) the foreign account. In the process it creates a one-way trust to the resources on the remote domain. This command achieves the objective of joining the trust relationship:

root#  net rpc trustdom establish DAMNATION
Password: xxxxxxx	== f00db4r
Could not connect to server TRANSGRESSION
Trust to domain DAMNATION established

Validation of the two-way trust now established is possible as shown here:

root#  net rpc trustdom list -Uroot%not24get
Trusted domains list:

DAMNATION           S-1-5-21-1385457007-882775198-1210191635

Trusting domains list:

DAMNATION           S-1-5-21-1385457007-882775198-1210191635

Sometimes it is necessary to remove the ability for local users to access a foreign domain. The trusting connection can be revoked as shown here:

root#  net rpc trustdom revoke DAMNATION -Uroot%not24get

At other times it becomes necessary to remove the ability for users from a foreign domain to be able to access resources in the local domain. The command shown here will do that:

root#  net rpc trustdom del DAMNATION -Uroot%not24get

Samba HowTo Guide
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