To set an SPS 2003 portal to read-only or to do a “content freeze” for purposes of migration:
From here:
http://www.microsoft.com/technet/prodtechnol/office/sharepoint/2003/deploy/inwsssps.mspx
Follow these steps:
If you are migrating a site based on Windows SharePoint Services to a new location, you can set the site to read-only by locking the site. For more information about locking a site, see “Configuring Site Quotas and Locks” in the Administrator's Guide for Windows SharePoint Services.
1. |
On your server computer, click Start, point to All Programs, point to Administrative Tools, and then click SharePoint Central Administration. |
2. |
On the SharePoint Central Administration page, in the Virtual Server Configuration section, click Configure virtual server settings. |
3. |
On the Virtual Server List page, click the virtual server you want to set as read-only. |
4. |
On the Virtual Server Settings page, in the Security Settings section, click Manage user rights for virtual server. |
5. |
On the Manage User Rights for Virtual Server page, in the Rights section, clear all of the check boxes except for the View Items, Browse Directories, and View Pages check boxes. |
6. |
You can select all rights by selecting the Select All check box. You can clear all rights by clearing the Select All check box. |
7. |
Click OK. |
So, like this:
This should then allow you to perform any administrative duties necessary, including migration or backup, etc, with the administration account, since it does not use site groups to determine authority.




