Once you have created an Artstor user account, you can access the Digital Library without connecting to your institution's network by logging in to your account remotely. As a security measure, this remote access is set to expire after 120 days, but it can be re-set.
If you receive a message that your 120-day remote access period is expired you can re-set the 120-day countdown by logging in either on-site at your institution or through a proxy.
The 120-day remote access period is not available to registered users at public libraries, per the Artstor Digital Library's Terms & Conditions of Use.
If you have changed institutions, the remote access error message may indicate that you need to move your Artstor account to your new institution.