I can't make forums visible to guests.
 

I've looked everywhere I know to open my forums so guests and search engines can see the forum posting, but cannot locate the settings.

Any help appreciated.

Thank you.

First go into UserGroup Manager and setup Unregistered/Not-Logged-In. Then go to Forum Permissions and set the permissions for this particular usergroup.

Thanks Ranz.

Unfortunately, I tried that. Those settings are all set correctly. Somewhere else, I've got a setting that is not allowing guest access, but cannot find it.

Yeah, deny permissions overwrite allow permissions.
Usergroups => Forum Permissions (This shows the usergroup permissions for each forum).
Look for any guest deny permissions and see if it's related to your forum's permissions that you're having problems with.
Hope this helps!