Is there a way to allow all users from a particular domain to access a site? Right now I am having to place the domain and the user name for everyone that comes to the site. It is a site that is internal to the company. for example

<allow users="domain\user1,domain\user2,domain\user3" />

I tried using a wildcard like
<allow users="domain\*" />

but it does not allow that. Is there a different way?

Thanks!