Strange IIS Webserver Logfile extract

Here is an extract of IIS Web Server :

[Tue Nov 06 07:50:49 EST 2001] ignoring request from loopback interface:
POST /spipe/pkg HTTP/1.0
Accept: application/octet-stream
Accept-Language: en-us
Content-Type: application/octet-stream
User-Agent: Mozilla/4.0 (compatible; SPIPE/2.0; Windows)
Host: 127.0.0.1
Content-Length: 447
Connection: Keep-Alive

What does it means, which application is doing what ?