Microsoft IIS 4 (Windows NT) - Remote Web-Based Administration
source: https://www.securityfocus.com/bid/189/info Web-based administration for IIS 4.0 is, by default, limited to the local loopback address, 127.0.0.1. In instances where IIS4.0 was installed as an upgrade to IIS 2.0 or 3.0, a legacy ISAPI DLL ISM.DLL is left in the /scripts/iisadmin directory...